Tag: parrot biting

Easiest Behavior Fixes Ever!

It seems sometimes that the bulk of our days is spent trying to change the behavior of other species – spouses, co-workers, children, pets, and even pests.

We struggle to get our kids to do their homework, rather than stare at screens. We want the dog to sit rather than jump up on a guest. We search for non-toxic snail control. We stress out over parrots who scream, display aggression, or pull feathers, trying one tactic and then another to get them to stop. At the same time, we can’t get them to eat vegetables, play with toys, or accept a bath.

Consequences and Punishment

When it comes to problem behavior, our first impulse is usually to try to find a consequence to make it stop. Further, that consequence often takes the shape of punishment. 

We take away screen time if the homework doesn’t get done. We lock the dog into his crate when he jumps up. When the parrot screams, we spray him with water or cover his cage. If the bird bites, we put him into his cage for a “time out.”

Why are we so focused on the use of consequences to change behavior? Perhaps because it feels so familiar.

We are all familiar with the painful consequences of failure to plan or of our own miscalculations. We learn to use a hammer correctly when we bang our fingers often enough. We fix that step after we trip. We avoid jalapenos after a sleepless night of indigestion.

For many of us, consequences in the form of punishment from others are also very familiar. If we run a red light, we pay the price of a ticket. If kids misbehave in school, they get a visit with the principal. If we break a law, we go to jail. For those of us who have taken a spin around the sun more than a few times, we can remember being spanked by our parents for wrongdoing – an accepted practice back when we were young.  

We live in a society in which consequences, especially the consequence of punishment, is the first “go to” method for changing behavior. Is it any wonder then that we focus on consequences when we need to change a parrot’s behavior?

Of course not! It feels familiar and punishment, delivered skillfully, will serve to decrease the problem behavior in the future. Moreover, it often feels good to the punisher, since it can relieve frustration and anger.

However, many problems derive from the use of punishment. Results of positive punishment may include a desire to escape, with a display of either fear or aggression. Another unforeseen result is apathy, in that other behaviors may be suppressed as well. Results of negative punishment include stress and frustration.

In general, taking action to punish a behavior often results in broken trust and increased problems of another sort. (Chance, 1999) We do not want to be in the position of punishing our parrots as our primary tactic for changing behavior.

Applied Behavior Analysis

There is, thankfully, a much better way to successfully solve many behavior issues. By changing antecedents, we can both make problem behaviors less likely and cause desired behaviors to occur more often.  

I have brought you through the backdoor into the house of applied behavior analysis. Applied behavior analysis (the science of behavior) gives us a systematic, scientifically-proven method for changing behavior.

Please note that most of the behavior suggestions found on Facebook and other social media sites are not science-based. Most offering advice have a bad case of not knowing what they don’t know. Anyone “researching” behavior problems must question the credentials of anyone offering advice.

In contrast, the approach provided by applied behavior analysis can be trusted to work if practiced correctly.

We need focus on only three things when we need to change a specific behavior. In addition to the behavior itself, we examine the antecedents and the consequences. We are all familiar with the consequences of course. They are the events that occur immediately after a behavior that influence the rate at which that behavior will be offered in the future. (Luescher, 2006) Punishment is a consequence that reduces a particular behavior in the future.

A far better strategy whenever possible is to deftly arrange antecedents in order to support the likelihood of a desired outcome.

Antecedent-based Interventions

According to Friedman, Martin and Brinker, “Antecedents are the stimuli, events, and conditions that immediately precede a behavior.” Antecedents set the stage for the behavior to occur; the behavior will not occur without the presence of the antecedent.

Changing antecedents in order to change behavior is a more ethical, often simpler and easier way to change behavior. So easy in fact that, when I suggest such a change, clients will look at me with a bit of skepticism. I can see them thinking that things really can’t be that easy. 

Antecedent changes can be used in order to make it easy for our birds to perform the behaviors we do want and to make it hard or impossible to perform the behaviors that we don’t want to see.

Let’s review some examples of using antecedent changes both to decrease problem behaviors and to set birds up for success when performing new or unfamiliar behaviors.

Decreasing Problem Behaviors

Aggression and “Nippiness”

Antecedent changes are the “name of the game” when it comes to solving problems of aggression.

Example One: Some types of misbehavior occur when a bird is on the shoulder. Perhaps a bird, who has been sitting on your shoulder for three years without problem, suddenly begins to bite when up there. Perhaps he nips your earlobes or pulls your glasses off or rips an earring out.

Antecedent Change: In this case, the recommended antecedent change is simple – just don’t allow the bird onto your shoulder. Instead, you can teach him to station on a perch near you by offering reinforcers frequently. This will actually increase his quality of life more than sitting on your shoulder does. It both encourages independent behavior and offers him control over access to reinforcers.

Example Two: Your bird lunges at you when you are changing out food dishes.

Antecedent Change: Teach him to station up on a perch in the cage located furthest from the food dishes. When you show up with the food dishes, have with you a good-sized favorite treat that will take him a minute to eat. By moving your hand on the outside of the cage, lure him up to the designated perch and then give him the treat through the cage bars. Quickly switch out the dishes. Continue to do this every time you feed him. He will begin to scramble up to the preferred perch as soon as he sees you arrive with his food.

Example Three: Your flighted bird attacks your hands when you hold a book or tablet.

Antecedent Change: Either put him into his cage or outdoor aviary while you read or read in another room.

Example Four: Your bird bites when you ask him to step up.

Antecedent Change: You begin to reinforce stepping up by first showing and then immediately delivering a preferred food treat. At the same time, you read your bird’s body language and honor that by making use of a start button.

Screaming or Other Problem Noise

Example One: Your parrot enjoys perching where he can look out the window, but screams frequently when he sees neighborhood action taking place outside.

Antecedent Change: Purchase some sheer curtains and keep those closed when the noise will be inconvenient. You can still have the light without the noise.

Example Two: Your parrot is too loud when you have company. You might have learned to live with this, but it may upset your visitors and make it hard to enjoy yourselves. 

Antecedent Change: If you have a sleep cage, turn it into a “siesta cage.” Add a hanging perch above and a playstand beside, then place toys and foraging projects there. This way, your parrot can be relocated before your visitors arrive.

Example Three: Your parrot screams when you get on the phone.

Antecedent Change: Go into another room or outside to talk, if the call cannot be predicted. You might also try using the speaker phone function, since it is often holding the phone to your ear that acts as the stimulus for the noise.

Example Four: Your parrot screams when you and your spouse have a conversation in another room. This often results when a pair bond exists between the parrot and one of the partners. Additional measures will be necessary to resolve this social dynamic.

Antecedent Change: A simple antecedent change for the short term is to have the parrot present for the conversation. In this case, isolation is a problem.

Increasing Desirable Behaviors

Improving the Diet of Small Birds

It’s common for small parrots like budgerigars, cockatiels and lovebirds to eat a seed mix as the dietary staple. After all, that’s what the breeder or pet store sent you home with, along with that too-small cage, the cuttlebone, and the plastic toy with a bell inside.

If you have a bird like this and have learned about the dangers of such a diet, you may have struggled to get your bird converted to pellets and other foods.

Antecedent Change: Offer new foods in dishes that are right near to the bird’s favorite perches. They are more likely to accept these new foods sooner when they are right under that beak. This means that eating the new foods is easier, in terms of energy use.  

Teaching Larger Parrots to Eat Vegetables

Many parrots who have been eating a seed mix typically resist the consumption of both vegetables and pellets. In part, this is due to their neophobic nature. The other problem is their tendency to be naturally drawn to high-fat, carbohydrate-rich foods.

Antecedent Change: Measure out the amount of seed that your parrot eats in a day. This is important. You can’t decrease it if you don’t know what quantity you are offering to begin with. Before feeding, mix the seed into an equal measure of finely chopped vegetables or Chop Mix. Gradually begin to incrementally decrease the amount of seed offered daily as your parrot begins to eat the vegetable mix. By the time that you have stopped offering the seed mix at all, your parrot will have begun to eat both the pellets (if offering those also) and the vegetables.

Antecedent Change #2: Offer the pellets or vegetables in a different location, such as on top of the cage or on a play stand. This will often encourage consumption and I have no idea why. When I was working full time, my parrots ignored pellets in their cages. When I put them on play stands, they began eating them eagerly.

Playing with Toys

I hear many owners complain that their parrot doesn’t play with toys. There are certainly parrots who do not interact with any enrichment. These birds can be taught to interact with toys and foraging opportunities, but this requires consistent and focused training.

Still other birds might interact with toys, but do not do so because it is too difficult or inconvenient. For example, many wooden toys sold for certain species are actually too difficult for them to chew. Either the wood itself is too hard or the pieces are too big. Toy manufacturers have caught onto the fact that you won’t be happy if your parrot destroys in 15 minutes a toy that cost you $15.00. The problem with this is that the sorts of things that interest parrots are those that they can destroy quickly.

Antecedent Change: Make toys at home, using designs from my pamphlet Parrot Enrichment Made Easy. This includes suggestions for making quick, easy-to-chew wooden toys, in addition to those made of paper, cardboard, and fabric.

Antecedent Change #2: In addition, make sure that toys and foraging options are placed very near perches on which your bird chooses to spend time. I have seen toys attached to the inside back of the cage with no perch in sight. I have seen toys placed near perches that are so close to the back of the cage that the parrot can’t comfortably turn around on the perch and can only sit on it facing backwards. Pretend you are your parrot and ask yourself if you can easily interact with the enrichment you have in the cage. Make sure that your parrot can perch easily in a spot where he can easily reach his enrichment items and won’t bang his tail if he turns around.

Encouraging a Bath

Another common complaint concerns the larger parrot who won’t accept a bath. This bird might bathe in the water dish occasionally, but doesn’t get wet enough.

Antecedent Change: Many owners have noticed that their parrot displays bathing behavior, usually in the water dish, when the vacuum cleaner is running. In addition to marveling at this strange phenomenon, you might also choose this as a time to offer a few spritzes from a spray bottle, especially if the parrot isn’t scared by the sight of the bottle. And if he is, perhaps you can conceal the bottle with a kitchen towel or piece of cardboard so that just the nozzle is visible.

Fun with Antecedents

I’ve provided examples of very simple antecedent changes for very simple problems so that you could get the idea. The whole process can be, and usually is, more complicated, and this is where the fun comes in.

In most cases, there are several possible antecedent changes that might work. So, when you identify that you have a problem, sit down with a piece of paper and brainstorm as many as you possibly can, even if a few seem unlikely or even silly.(You may also need to teach other, new behaviors using positive reinforcement, but you can at least get a head start on a solution in this way.)

Remember not to get caught up in trying to figure out what the parrot is feeling or thinking. Instead, just focus on the behavior itself. Then, implement for a week or so the one that you think is most likely to work. Measure the results by observing closely what happens. If that tactic seems to not be working, go on to the next most likely.

I’ll give you an example from my own case files. I know a particular parrot who pulls pin feathers during the night. These are observed on the floor of the cage or the cage cover in the morning. This is a perfectly well-adjusted, flighted parrot on a good diet with an excellent environment that encourages movement and provides lots of enrichment.

Possible antecedent changes include the following: (1) Encouraging more food consumption before bed; (2) Encouraging more exercise before bed; (3) Partially, rather than completely, covering her cage; (4) Giving her some enrichment in her cage to chew on during the night; and (5) Allowing her to stay up a bit later.

This case remains a work in progress. Since the feather damage is occurring only at night, it may well be related to a disease process. However, since veterinary treatment has been completed, it still makes sense to examine antecedents.

A Last Word

Antecedent changes provide us with science-based, ethical, and effective tactics for behavior change. Many simple problems can be resolved through these alone. Using antecedent changes, we can set our birds up for success by encouraging behaviors we would like to see.

All behavior principles that are scientifically proven, like the use of positive reinforcement and antecedent changes, work for humans too. They work across all species lines.

Perhaps we reach so readily for punishment when dealing with parrots is because we as a society use punishment almost exclusively to deal with our children and others.

It’s been a long time since my own kids were young. I was lucky enough back then to discover the book “How to Discipline with Love: From Crib to College” by Dr. Fitzhugh Dodson, which was published in 1992. As Fitzhugh points out, parents all across America are teaching their children to behave badly.

They ignore them when they are behaving well, usually desperately trying to get something else done, and instead provide attention (reinforcement) when they behave badly – throwing a tantrum in the grocery store, fighting with siblings, or refusing to go to bed.

He provides clear instructions for how we can turn that dynamic around. As we all struggle now with staying in place, physical or emotional isolation, and the anxieties related to contracting COVID-19, there is no better time than the present to begin practicing both antecedent changes and the use of positive reinforcement with our parrots, our children, and other family members. “They” say that things won’t be the same once this is all over. This is one change I would like to see that would benefit us all.

Resources:

Chance, Paul. Learning and Behavior. Pacific Grove: Brooks/Cole Publishing Company, 1999

Friedman, S. G. (2009). “Behavior fundamentals: Filling the behavior-change toolbox.” Journal of Applied Companion Animal Behavior, 3(1), 36–40. http://www.behaviorworks.org/files/journals/Behavior%20Fundamentals%20JACAB.pdf

Friedman, S.G. (2008) “10 Things Your Parrot Wants You to Know About Behavior.” Psittacine Magazine, May 2008. Pgs 14-16. http://www.behaviorworks.org/files/articles/10%20Things%20Your%20Parrots%20Want%20You%20to%20Know.pdf

Friedman, S. G. (2001) “The ABCs of Behavior.” Original Flying Machine, Issue 9: Nov-Dec, 2001. http://www.behaviorworks.org/files/articles/ABCs%20of%20Behavior%202004.pdf

Luescher, Andrew. The Manual of Parrot Behavior. Ames: Blackwell Publishing, 2006. Chapter 14: Friedman, S.G., Martin, Steve, Brinker, Bobbie. “Behavior Analysis and Parrot Learning.” Pg. 147-163.

McGuire, L. (2015) “The Parrot That Screams.” Psittacine Magazine. Pgs 10-11. http://www.behaviorworks.org/files/offshoots/Parrot%20that%20Screams%20-%20WPT%20PS%20Summer%202015.pdf

Encouraging Natural Behaviors in Captive Parrots

My last blog post concerned risk factors for feather damaging behavior, specifically lack of both liberty and control. The bigger consideration, of course, within this conversation about why parrots would damage the very things they need for survival, is quality of life.

In that last blog, I included a quote from Lauren A. Leotti and her co-authors: “In the absence of other stressors, however, the removal of choice, in and of itself, can be very stressful. It has been found that the restriction of behaviors, particularly behaviors that are highly valued by a species, contributes to behavioral and physiological manifestations of stress. It seems that the aversive effects of captivity may depend upon the extent to which behavioral choices have been reduced relative to what could be performed in the natural environment.” (Leotti, 2010)

Photo courtesy of Siljan Nicholaisen

Simply put, if captive parrots are unable to perform natural behaviors, the effects of captivity are going to result in serious behavioral and physical problems, which is exactly what we are seeing. Problems with biting, screaming, fear, and feather damaging behavior are all around us, as are growing numbers of parrots dying from atherosclerosis.

A New Paradigm

I’ve given this issue – the allowance of natural behaviors – a great deal more thought since I published that last blog post. While I did include in that post some strategies for supporting natural behaviors, this will be a deeper dive into that topic. I may repeat myself just a little, but we can’t hear this stuff too many times, right?

I suggest this model, the encouragement of natural behaviors, as the new paradigm for the way in which we care for our parrots from this point onward. In the past, our parrot-keeping efforts have been shaped by other concepts and models. Let’s take a moment to examine those in order to understand what may still be shaping our thinking as we attempt to move forward

Older Models for Parrot-Keeping

Dominance and Control

One of the most historically destructive models for the parrot-human bond has concerned that of dominance. In 1992, the following appeared in a popular magazine in an article about cage dominance: “To have a well-behaved parrot, owners must establish themselves as the dominant partner in the pair or flock bond….  As the bird establishes dominance over its cage, it becomes dominant everywhere.” (Blanchard, 1992)

In 1996, this message about the need for the human to be dominant was in the process of being softened and was now called Nurturing Dominance.  “By establishing a relationship of nurturing dominance by teaching and consistently using the four basic commands, you can successfully demote your parrot from its perceived position as head of the flock.” (The four commands were: “Up,” “Down,” “No,” and “Okay.”) (Wilson, 1996)

In 1999, these “principles” of dominance and control were formalized in book form, with yet another name change to Nurturing Guidance. An entire page was given over to the concept of height dominance.

As it was explained: “People who have not established Nurturing Guidance  will have trouble with height dominance, but they will most likely also have trouble with cage aggression, excessive screaming, biting, and other behavioral problems. I find that when people are having behavioral problems with their parrots, establishing non-threatening height dominance is the only way owners need to work with their birds.”

In other words, you won’t have behavior problems if you keep the bird down low and establish your own dominance. (If you need a really great counter argument to the myth of height dominance, read trainer Steve Martin’s article Understanding Parrot Behavior, Naturally.)

It is a sure sign that a behavioral “principle” has no validity if you need to keep morphing the concept and the name to make it more palatable to your readers. Moreover, if there is a dominant member in a relationship then, by definition, there must be a submissive member. Is that really the best we can do for the birds we love – to make them submissive so that they will behave?

In reality, there is a natural science of behavior that has been studied for over a century and has produced a set of fundamental principles, now known as applied behavior analysis (ABA). ABA can both explain why behavior occurs and provide ethical methods for behavior change when this is desired.

Unfortunately, those concepts of dominance and control are like the film on the bottom of our parrot’s water dishes, pernicious, insidious, always in the process of establishing themselves yet again. In the past two weeks, I have talked to new clients who expressed concerns about their parrot being up too high. It is scary how persistent this concept remains in the minds of parrot owners.

Clipping Wings Keeps Parrots Safe

Wing clipping has been practiced with almost religious fervor for decades in this country. This concept has been so well embraced that it was not even questioned for years, despite the fact that we were depriving a living animal of moving around normally. In large part, this practice has been established and maintained as the right thing to do by those doing the clipping – veterinarians and groomers.

Unfortunately, in all cases I have found, those writing about the dangers of flight have never lived with a flighted parrot in their lives. While well-intentioned, they do not understand flight and the manner in which flight skills develop, nor what can be done to ensure safety for flighted parrots.

Further, in my experience as a veterinary technician, no owner ever came in and requested a wing trim so that her bird would be safe. Instead, these requests were made because the bird was getting “uppity” now that it could fly. “Uppity” translates into being uncompliant and/or beginning to bite

Thus, in reality, wing clipping has been used in large part as just another way to maintain control of our parrots – limit their ability to move around and keep them down low. In other words, take away their feelings of safety so that they are less likely to resist our “commands.”

Other Models

A myriad of other well-established concepts exist, of course. These persist because of their authority borrowed from the reality that “everyone does it.”

These practices include keeping parrots in cages for most of every day, keeping parrots indoors at all times, cuddling parrots, cramming cages into a small room to contain the mess and noise, purchasing dome-topped cages, feeding seed diets…and the list goes on. We can always find someone else who does exactly what we do in order to validate our own choices.

A New Paradigm

We have before us a new decade. Let’s allow it to inspire us to shed the old skin of outmoded and destructive ideas and adopt a new paradigm for parrot-keeping. Should we do so, I would propose that we include as the most important criteria:

  • The provision for every parrot of as many natural behaviors as possible in each living situation.
  • To embrace the science of behavior, specifically the strategies of (1) arranging the environment for success, (2) antecedent change, and (3) positive reinforcement, to live harmoniously and cooperatively with our birds.

For the remainder of this blog post, I will be focusing on the provision of natural behaviors for our parrots, for there is much still to explore in this area. I have already written several posts on the second criteria of behavior change strategies, and will no doubt continue to do so in the future.

For now, I will leave you with the thoughts of trainer Steve Martin: “When you give an animal a voice through its body language, and place that voice in higher regard than your own, you are on the right path to successful training.”

Natural Behaviors to Encourage

Natural behaviors for wild parrots have been described as flying, foraging, bathing, roosting, socializing, vocalizing and breeding. However, there are others we might explore from the perspective of the companion parrot’s status in our homes. Some of the latter may attain a greater level of importance, given the often narrow scope of decision-making granted to them.

Two things: (1) First, this is an initial attempt only to explore this topic and my hope is that we can all brainstorm together from this point onward, and (2) I could write a separate blog post about each of the sections below, but in the interests of reasonable length, I have elected an introduction of each idea in most cases. Where I have important details to offer, I have done so.

A word about rights before I continue: If parrots enjoy certain activities in the wild, then would we not be correct in describing these same things as birthrights?

Bathing Options

Showering is important as a form of exercise and enrichment; it also serves to encourage normal preening. Opportunities most commonly involve taking the parrot into the shower or misting with a spray bottle. Other options should be explored in the interests of introducing variety.

Some parrots love to leaf bathe. Try offering a bunch of Swiss chard or fresh branches soaking wet and tied to the side of the cage or placed in a shallow dish. Both small and large parrots enjoy this activity once they are used to it.

Some parrots prefer bathing outdoors in an aviary, either in the spray from a hose or when it’s raining. Perhaps a water feature could be installed in the aviary?

We also have some exciting new products available – the unique creations by John Langkamp.

John creates bathing stations in all sizes that allow birds to bathe at liberty – when they feel like it. He also produces platform perches in a myriad of designs, play stands from the simplest table-top perch to two story sands, and “balconies” for cages that have no play tops. All of his products support the parrot’s engagement in natural behaviors.

Drinking Water

Parrots relish in fresh water. Mine eagerly drink from a freshly filled water dish, even though a moment before it still contained unsullied water. It has always struck me as wrong to limit a parrot’s access to water to drops coming out of a bottle. Wouldn’t you find it frustrating to have to lick droplets one at a time in order to drink?

Aside from the ethical problem of restricting a parrot’s access to water to this degree, water bottles can be risky. When water stops flowing, it becomes stagnant. Stagnant water is a breeding ground for certain bacteria species, such as Pseudomonas. (WHO, 2003)

When you wash out a parrot’s water dish, you will notice a film on the bottom. This is called the biofilm and is a coating in which water-borne bacteria grow.(Univ. of Ill, 2018) To adequately clean the water dish, you need a scrub pad.

With a water bottle, the water remains in the bottle for a longer period, thus enabling this biofilm to develop often for days. Refilling the bottle with fresh water does nothing to clean off the biofilm. Other risks involve bottle malfunction, which has resulted in the loss of parrots from dehydration.

My suggestion is to ditch the water bottles and let your parrot have a dish of water. Cleaning it twice a day should be sufficient, even for the messiest of parrots.  If it gets poop in it, move it to another place in the cage up higher.

Foraging

This has become the new buzz-word in the world of parrot enrichment, for good reason. However, we can expand our thinking even further. Parrots who naturally forage on the ground should be provided with opportunities of this nature. Grass mats for birds like budgerigars, cockatiels, and kakarikis are often eagerly accepted after just a few days.

Another great option is to place papers over the grates in the bottom of cages. There are several advantages. The birds get to go down onto the papers to forage for what they have dropped. I don’t have to scrub the cage grates. Changing papers is easy because all I have to do is to pick up the top later of paper; no need to pull out that heavy tray except for once a week. Many imagine that this will just result in poop-covered feet. It’s not appropriate for all parrots, but try it! You’ll be surprised.

Photo courtesy of Chris Shank

Foraging for natural plant materials can be provided in aviaries. Raised beds can offer millet, sunflowers and other edible flowers,  greens and other vegetables to encourage a more natural foraging experience.

Fresh Air and Sunshine

There is no other single thing you can do to provide enrichment that will reap as many benefits as setting up an outdoor aviary. The benefits are now widely recognized. Parrots are exposed to those necessary UVB rays. They wear themselves out and come back into the house calm and relaxed at the end of the day. They have access to different enrichment and bathing opportunities.

If you need some ideas, ask to be a member of the Home Aviary Design group on Facebook. It’s a private group, but is generous in accepting new members. The group has good participation and provides information about everything from design, to wire type, to rodent control and more.

Height and Alternate Perches

Parrots feel safer when perching up high. This is a birthright and a great way to provide enrichment.  They also need to move around. “In this respect, most parrots are neither sedentary nor migratory but mobile within a geographical area that provides for all of the bird’s needs, but not necessarily all at once in one locality.” (Parr, 1998)

Photo courtesy of Maha Tahiri

This observation of wild parrots can inform our own choices when creating an environment. Both flighted and clipped parrots can be provided with (and taught to use) free standing play gyms, hanging perches and other adornments to the environment that support more natural movements.

Lorenzo, the Double Yellow-headed Amazon in the photo was just adopted into a new home; he eagerly took to the trapeze they had prepared for him before his arrival.

Liberty Flying

I have published six blog posts on indoor flight for companion parrots. I am a passionate advocate for the allowance of flight, while also recognizing that some older parrots will not be good candidates for this experience.

It is not ethical to remove an animal’s ability to move around at will. As behavior consultant Jim McKendry once said, “If a dog gets out of the yard and bites the postman, we don’t cut off his legs. Instead we build a better fence.”

We must work towards the day when anyone breeding parrots must provide for a full fledging experience and then send that baby home without a wing clip. From that point onward, the new owner must learn how to live safely and cooperatively with a flighted parrot. We must also educate our veterinarians regarding a better way of thinking.

Imagine, just for a moment what your relationship might be like with a parrot who trusted you this much:

Video Courtesy of Lee Stone

Others’ Feathers

You should never get a second parrot because of the assumption that it will make the first happier. But, if you want to get a second parrot, my heart will be happy at the news.  Having always lived with multiple parrots, I see how each bird gains just from having other feathered creatures in the home.

Photo courtesy of Mandy Andrea

This is true even if the two parrots never interact physically. No other companion animal moves the way a bird moves. No other animal vocalizes like a bird does. No other animal reacts like a bird does. Just having another set of feathers in the house is enriching on multiple levels for a companion parrot.

The Unobstructed View

What effect might it have for a parrot to live his entire life within four walls? Perhaps none. On the other hand, I’m acutely aware of my own reaction when I get outdoors. It’s not just the feel of the breeze or sunshine, or the smell of nearby plants, but the fact that I am not confined. Finally, there is no barrier between me and the natural world.

How might we erase those walls, other than to get the parrot outdoors into an aviary? A Wingdow perch is of great appeal to many birds.

Wood, Branches and Bark

We don’t really know fully how parrots interact with the natural plant materials in their environment when that activity occurs outside of foraging for food. We do have some clues, however.

Donald Brightsmith and other researchers who have taken samples from the crops of wild macaws still in the nest have identified a percentage of bark chunks in the crop. Chris Shank and I have observed her free-flighted cockatoo parents foraging outside the aviary for bark and then returning to feed it to their young.

Photo courtesy of Chris Shank

My own parrots love to strip the bark off of fresh branches. We don’t understand the purpose of these behaviors. However, I suggest that providing fresh branches for perches and chewing enrichment may well be necessary for quality of life.

There has been much written about the dangers of bacteria and fungus on plants taken from the outdoors. However, these come under the heading of “imagined” dangers.

Advice for “disinfection” stems from washing with vinegar to baking them in the oven. I believe, based upon anecdotal evidence, that these measures are unnecessary. If you are worried about “germs,” give the branches a good blast with your hose to dislodge anything suspect.

Two such “vases” with pine 2 x 4s on either side as chewable perches.

A great way to bring fresh branches into the home for your parrots’ enjoyment is to first create a “vase” for them. Purchase PVC pipe that is 4 to 6 inches in diameter, then cut a length about four feet long. You can paint this green for aesthetic appeal. Put this into a large Christmas tree stand and tighten in place. When ready, shove the branches down into the top of the pipe and replace as needed.

If you choose actively growing branches with the bark intact, there is little danger. Simply stay away from branches where the wood looks old and the bark is falling off of it, for fungus could be growing under the bark in those cases. Just allow common sense to prevail.

If unsure of the safety of certain trees, you can refer to this website. If you are unable to identify a tree species, you can take a sample into a garden center for identification.  

The Keys to Change

It is human nature for most of us to reject an idea when we first hear of it, especially if it means more cost, inconvenience, or work…as most of those above will.

However, do you remember my point in that last blog about how our own behavior harm us? If we fail to appreciate that many of our practices for keeping companion parrots either do not meet their needs, may harm them, or even meet the definition of unethical, yet we insist on maintaining our own positive self-image, discord results – internal and external.

Let’s begin by deciding to be a bit more open-minded to the ideas above. Remember that you don’t have to help anyone else see the light. You just have to help yourself to see the light.

You can choose to stay away from opinionated discussions on social media and instead do your own research to find information from reputable sources. Then, if you get to the point of being convinced that you can make some improvements, just brainstorm to see what might be possible. Things don’t have to be black and white. You can start small.

Resources:

Blanchard, Sally. “The Importance of Cage Dominance.” The Pet Bird Report. Sept/Oct 1992: 4-7.

Blanchard, Sally. The Companion Parrot Handbook. Alameda: PBIC, Inc., 1999.

Juniper, Tony and Parr, Mike. Parrots: A Guide to Parrots of the World. New Haven: Yale University Press. 1998.

Leotti, Lauren A., Iyengar, Sheena S., Ochsner, Kevin N. (2010) “Born to Choose: The Origine and Value of the Need for Control.” Trends in Cognitive Sciences. 14.10: 457-463. https://doi.org/10.1016/j.tics.2010.08.001

Luescher, A. ,ed. Manual of Parrot Behavior. Ames: Blackwell Publishing, 2006.

University of Illinois at Urbana-Champaign. 2018. “Model to show how bacteria grow in plumbing systems.” Science News. https://www.sciencedaily.com/releases/2018/03/180329190849.htm

Wilson, Liz. “Nurturing Dominance: What It Is and How and Why It Works.” The Pet Bird Report. October 1996: 32-35.

World Health Organization (WHO). 2003. Heterotrophic Plate Counts and Drinking-water Safety. Edited by J. Bartram, J. Cotruvo, M. Exner, C. Fricker, A. Glasmacher. Published by IWA Publishing, London, UK. ISBN: 1 84339 025 6. https://www.who.int/water_sanitation_health/water-quality/guidelines/HPC4.pdf?ua=1

Thank you for reading my blog. I am Pamela Clark, an IAABC Certified Parrot Behavior Consultant. My passion is helping people with their parrots. To access free resources, schedule a consultation, subscribe to my newsletter (a different publication from this blog, or purchase my webinars, please visit http://www.pamelaclarkonline.com.

a.k.a. “Hormonal Behavior”

What you will read below has not been proven scientifically, so I have few resources of that nature to offer you to substantiate what I am about to say. However, my own anecdotal experience, as well as that of other respected professionals and the experiences of my clients, have convinced me of the veracity of the information in this post.

Those of us who live with adult companion parrots are familiar with behavior changes that occur at certain times of the year or in response to certain activities in which the parrot participates. We have collectively labeled these changes as “hormonal” behavior.

What is “Hormonal” Behavior?

The behaviors that typically result from this turned on reproductive desire include intense bonding with one person in the family, cavity-seeking behavior, paper shredding on the bottom of the cage, loud demanding vocalizations, and fierce territoriality (resource guarding). Parrot owners often initially consider it cute when their parrot wants to be with them constantly and becomes obsessed with getting into dark drawers or closets, but over time these behaviors become problematic.

While these behaviors may happen only seasonally in the beginning, they can progress in some individuals until they occur year round. In many cases, they lead to problems such as feather damaging behavior, self-mutilation, regurgitation of food, masturbation, chronic egg-laying, egg binding and cloacal prolapse. It is not unusual for these behaviors to surface when the parrot is well into adulthood, often coming as a surprise to the owner who has come to take for granted more stable conduct.

What Is Not Hormonal Behavior?

I want to make one thing clear before we go on. There is a lot of misbehavior that gets blamed on “hormones” that actually is the result of a lack of behavioral guidance and training.

For example, screaming for extended periods and biting are not “hormonal” behaviors. While a parrot may reach a more heightened state of arousal during periods of increased hormone production, which may predispose him to aggressive or excessively loud behavior, this does not automatically evolve into a behavior problem simply because of the presence of reproductive hormones. These problem behaviors instead reflect a lack of appropriate training and need to be targeted as such to effect a resolution, in addition perhaps to making the changes suggested below.

Our Lack of Preparation

Our decades of experience living with dogs and cats has done little to prepare us for the realities of living with parrots. We typically neuter dogs and cats. Further, having relatively short life spans, they do not change their behavior much once adulthood is reached.

We have yet to discover a safe way to neuter parrots en mass. Further, many parrots change their behavior with each year. I would be a rich consultant if I had a dollar for every client who has said to me, “Well…he never did that before!”  The bird you have in your home today is likely not the bird you had in your home a year or two ago.

I believe that we don’t quite yet grasp the ramifications of this for parrots in our homes and our responsibilities for guiding our parrots’ behavior so that these problems can be prevented.

Here is what we fail to understand: The scarily intelligent and reproductively driven adult parrot will be a genius at teaching us to provide for him the conditions that will support increased production of reproductive hormones.

We also fail to grasp how the conditions we provide in captivity differ from those in the wild. Since most of our parrot species are not yet domesticated, we must take this fact into consideration.

According to Dr. Fern Van Sant, there are two key issues that have lacked consideration. First, parrots in the wild are normally “turned off” or reproductively inactive when out of breeding season. Second, the “surroundings of abundance” which we provide in captivity often have the effect of keeping companion parrots reproductively active throughout the year. “As pets, the conditions of abundant food, bonded owners, comfortable cages and considerable physical contact seem to initiate breeding behaviors that become long term drives. Without the naturally occurring environmental pressure of dwindling food supplies, changing conditions, and competition for resources that limit breeding behavior in wild populations, breeding behaviors and hormonal drives persist unchecked.” (Van Sant, 2006)

A Serious Problem

This is a very serious problem. It is exceedingly difficult to control this phenomenon, once the parrot enters this physiological and behavioral tunnel. The complex of behaviors driven by reproductive hormones is at the heart of the vast majority of parrot behavior problems. It frequently leads to the parrot losing his home. For the parrot, it likely results in a constant state of frustration and chronic stress.

Getting your parrot out of this “hormonal tunnel” will require consistent effort over months and years. However, if you make the changes indicated herein, you will see slow and steady improvement.

These are the primary triggers that I believe sponsor this increased production of reproductive hormones:

  • Diet
  • Existence of a pair bond
  • Close physical contact and inappropriately affectionate interactions with the human
  • Ability to engage in cavity seeking and “nesting” behavior
  • A controlled environment lacking challenge

Trigger #1: Diet

I have a question on my behavior consulting intake form:  What are your bird’s favorite foods? 

The answers I receive are always the same: seed mixes, tree nuts, peanuts, white rice, mashed potatoes, pasta, grapes, bananas, dried fruit, crackers, bread, pancakes, pastries, peanut butter filled pretzels, French fries, chips and other human snack foods. These foods have a great deal in common. High in fats and/or simple carbohydrates, they provide more energy to the body. Energy is needed for breeding. Our parrots can show a strong preference for these types of foods, thereby “teaching” us to offer them.

Thus, the types and quantity of the foods you feed your parrots are the first triggers for the increased production of reproductive hormones. Foods that contain higher levels of fat and simple carbohydrates appear to trigger increased production of reproductive hormones. As Dr. Scott Ford explains in his article Balancing Your Parrot’s Lifestyle, “An overabundance of food, foods high in fat and calories, and too many food choices can all ‘turn on’ your bird’s reproductive desire.” (Ford, S. 2009)

Dietary Action Steps

The best diet for limiting hormone production is one that incorporates appropriate amounts of formulated foods, fresh vegetables, limited whole grains and limited fruit. The foods listed above as parrot favorites should not be fed at all – ever.

The only exception that exists to this rule is that of using seeds and nuts as reinforcers for training. A best practice: Never give a parrot a treat (preferred food) for no reason.

We must also be on the look-out for excessive food consumption. While I believe a good quality pellet is a wise addition to the parrot’s staple diet, some birds will overeat even pellets. Look for your manufacturer’s recommendation about the correct amount to feed as a starting point. 

Know what your bird is actually eating. Remember the relative size of the creature you are feeding; your parrot probably only weighs one or two pounds at the most.

Trigger #2: The Pair Bond

Although some variation exists among species, parrots in the wild display a tendency toward social monogamy  – the primary breeding unit consists of one female and one male.

Therefore, companion parrots have a tendency to bond with one person or bird or animal within the home. Unfortunately, a pair bond between the parrot and one owner is the standard in most companion parrot homes.

The presence of this pair bond stimulates cavity-seeking behavior and increased aggression, which results from resource guarding around the preferred human. In other words, if another person or animal comes near the preferred human and parrot when they are together, biting of one or the other is likely to result. This type of aggression often worsens as the years pass.

A pair bond appears to be stimulated and maintained primarily through time spent physically close. Two parrots will often form a pair bond if kept in the same cage. Pair bonds between the owner and her parrot result from cuddling, allowing the parrot under the covers or down the shirt, petting down the back and under the wings, in addition to time spent perching on the shoulder, lap, knee or chest.

How do you know if your parrot has formed a pair bond with you? You may observe masturbation in any location and regurgitation when near you. The bird may scream non-stop when you leave the room. He refuses to perch independently and constantly seeks out shoulder time or other close contact. Egg laying may also result.

It is always best to prevent the formation of a pair bond in a companion parrot:

  • If you have two parrots who get along, keep them in two separate cages, while still allowing them to enjoy a communal play area. (This is a best practice for many reasons.)
  • If you have recently adopted a parrot, use great care in how you interact. Keep him off of your shoulder and reward him for perching independently. Keep your hands off of him, except for occasional head scratches (if he enjoys those).

If your bird has already formed a pair bond with you, this can be evolved over time:

  • Gradually reduce the amount of time the bird spends perched on your body by providing several appropriate perches and teach stationing so that he can still perch near you (but not on you).
  • As you decrease your time spent physically close, focus on training instead – teach targeting and other fun behaviors, as well as those needed for husbandry. Over time, he will come to look to you for guidance, rather than physical affection.
  • Walk away if he regurgitates for you or displays in other ways sexually – be friendly but clear that these behaviors are unwelcome.
  • Keep your hands off the bird! No cuddling or petting down the back. (Brief head scratches occasionally are the only appropriate physical contact. )

Trigger #3: Cavity Seeking

Many adult parrots, especially if they have a pair bond, begin to display cavity-seeking behavior. They will attempt to access closets, drawers, bookcases – any spot in the home that is at least partially enclosed.

Spots with less light around the home become more fascinating. African Greys may show a preference for hanging out in the bathroom for long periods. Your parrot may want to play inside of large cardboard boxes or brown grocery bags. Many parrots begin to roam the floor to access spots under furniture, in corners, and other spaces that are small and enclosed. Small cockatoos and others will dig in the couch cushions.

A parrot will tell you if he’s relating to a particular spot as a potential “nesting site” by the way he interacts with it. He will want to spend extended periods there and may strongly resist coming away from that particular place.

Again, the best solution is prevention. Keep parrots out of drawers and closets. Keep them off the floor by teaching them to station and work on this on a daily basis. Do not allow parrots to hang out in bathrooms in your absence. Do not provide cardboard boxes that your parrot can get inside of. The same advice goes for brown grocery bags. If your parrot displays an intense desire to access a particular spot in the house, prevent access.

Trigger #4: The Controlled Environment that Lacks Challenge

I have never seen any other professional address this as a potential trigger. However, I do believe that a home that lacks “benevolent” challenges will foster more production of reproductive hormones than one in which challenge exists. I do have some anecdotal evidence in the form of one story, as well as ongoing success with clients, to support this.

I once, as a veterinary technician, assisted with the rehabilitation of a budgerigar who chronically laid eggs. We tried Lupron injections. We removed the bird’s favorite toy. We did some training. All without success.

Finally, we made two changes that stopped the egg laying. We put a new object into the bird’s cage every day and began the practice of moving the cage into a different room of the house every day. These were pretty extreme measures, but chronic egg laying was a life threatening problem for this particular patient. And it worked! She went on to live a long, healthy life.

What type of challenges am I recommending? Learning opportunities that take the bird slightly out of his comfort zone:

  • The regular introduction of new toys, perches, and activities. (If he is afraid of new things, acceptance can be taught.)
  • Rides in the car (once you have trained the behaviors of going into the carrier and remaining calm while this is moved).
  • Visits to friends’ homes
  • Regular time spent in an outdoor aviary (not a small cage – the experience is vastly different)
  • Training – teaching new behaviors

Other Interventions: Day Length and Medications

Altering Day Length

There are some species who display increased signs of hormone production as the day length increases. Typically, these are New World parrots – those who originated in the Americas.

This observation has led to the blanket, frequently offered advice to artificially alter the day length the parrot experiences by providing 10-12 hours of darkness each night. However, the effectiveness of this measure is largely misunderstood.

First, it only works with New World parrots – Amazons, macaws, Pionus, etc. Old World parrots (African greys, cockatoos, etc) typically go to nest first as the day length decreases. Thus, providing these species with an increased period of darkness can make matters worse.

Second, this advice often strips the owner of an opportunity to interact socially with the bird at least once a day, which deprives both of training opportunities, which might be more beneficial.

Third, most who try this approach don’t understand that the darkness must be absolute. Simply covering the cage at night doesn’t work, if any light can creep under the cover at any time. Usually the bird must be placed in a separate room that is outfitted with black-out shades so that light can be 100% controlled.

Lupron Injections and Deslorelin Implants

These medications can be helpful, but they too have limitations on their effectiveness. They will help “around the edges,” but will not be appreciably effective unless you also implement the dietary, social and environmental measures in this post. Please consult your avian veterinarian as to whether one of these might be appropriate for an individual parrot. As a technician, I prefer to see their use reserved for extreme cases in which egg binding is a present danger.

A Plan for Prevention

If you are just starting out with a parrot, please take the following advice to heart. It will prevent much heartache for you and will go a long way toward ensuring the highest quality of life for you and your parrot.

  • Encourage your parrot to look to you for guidance, rather than physical affection.
  • Encourage independence.
  • Foster equal social bonds with all family members.
  • Provide plenty of enrichment, frequently.
  • Provide an outdoor aviary.
  • Feed an optimal diet.
  • Train new behaviors.
  • Reinforce stationing.

Thoughts for Your Consideration

Sometimes we can love our parrots a bit too much – often to the point of inhabiting the shifting sands of good sense. Many have asked me if perhaps the parrot doesn’t need a mate and close physical contact, even if breeding is not possible. Often to them, the plan I suggest (as it appears in this post) seems to be one of social deprivation.

Historically, there has been great debate regarding whether animals are more influenced by “nature” or “nurture” – by their biology or their learning experiences. Certainly reflexes, fixed action patterns, and inherited traits influence behavior in our parrots. In layperson’s terms, these are often lumped into one category and referred to as “instinctive behavior.”

Science has proven however, (1) that these are largely modifiable through learning, (2) that learning is necessary for their development, and (3) that learning plays a much larger role in the behavior we see than does genetics. For example, a young parrot may have the urge to fly, but it is only through the practice of flying that skills develop to competency.

So it is with pair bonding and cavity seeking. Sexual urges may exist in our parrots, but these will not become full-blown drivers of behavior unless practiced. Through practice they are reinforced and become ever stronger and more influential on the bird’s behavior.

Companion parrots live happier and healthier lives if never allowed to practice these behaviors. None of my own parrots has formed a pair bond with me and I believe that this is due to my relatively “hands off” approach with them. I interact with them frequently when training, reinforcing desirable behaviors when I see them, giving occasional head scratches, and providing care. Otherwise, we live a pretty parallel existence. They are not allowed on my shoulder. I don’t pet them. I don’t cuddle with them. We are all happier as a result.

References:

Brue, Randal. Avian Medicine: Principles and Application. “Nutrition.” Pages 23-46. Lake Worth: Wingers Publishing. 1997

Chance, P. Learning and Behavior, 4th Edition. Pacific Grove: Brooks/Cole Publishing Company. 1999

Ford, Scott, DVM, Dipl ABVP. (Date uncertain). Balancing Your Parrot’s Lifestyle. http://www.avian-vet.com/sites/site-2271/documents/asvsa-client%20handouts-balancing%20parrot%20lifestyle.pdf. [Accessed 3 Sept. 2009]

Hoppes, Sharman. DVM, Dipl ABVP. (2018) Reproductive Diseases of Pet Birds. Merck Veterinary Manual. [online] Available at: https://www.merckvetmanual.com/exotic-and-laboratory-animals/pet-birds/reproductive-diseases-of-pet-birds. [Accessed 25 June 2018]

Nijboer, J. (2018) Nutrition in Psittacines. In: Merck Veterinary Manual. [online] Available at: https://www.merckvetmanual.com/management-and-nutrition/nutrition-exotic-and-zoo-animals/nutrition-in-psittacines. [Accessed 25 June 2018]

Orosz, s. DVM, DABVP, DECAMS. (2006) Avian Nutrition Demystified. In: North American Veterinary Conference Proceedings, Volume 20. [online] Orlando: IVIS. Available at: http://www.ivis.org/proceedings/navc/2006/SAE/565.pdf?LA=1.  [Accessed 23 June 2018]

Ritzman, T. DVM, DABVP. (2008) Practical Avian Nutrition (Proceedings). CVC In San Diego. Lenexa: UBM Animal Care. Available at: http://veterinarycalendar.dvm360.com/practical-avian-nutrition-proceedings. [Accessed: 25 June 2018]

Van Sant, F. DVM. (2011) Hormones: The Downside of the Good Life.[Blog] Phoenix Landing Blog. Available at: https://blog.phoenixlanding.org/2011/04/30/544. [Accessed 25 June 2018]

Van Sant, F. DVM. 2018. Hormonal Behavior in Pet Birds – Introduction. [Newsletter] For the Birds DVM. Available at: https://www.forthebirdsdvm.com/pages/hormonal-behavior-in-pet-birds-pt-1. [Accessed 25 June 2018]

Van Sant, F. 2019. “Hormonal Behavior in Pet Birds, Part One. For the Birds Blog. https://www.forthebirdsdvm.com/pages/hormonal-behavior-in-pet-birds-pt-1. Accessed 8/17/19.

Thank you for reading my blog. I am Pamela Clark, an IAABC Certified Parrot Behavior Consultant. My passion is helping people with parrots by offering behavior consultations and publishing information you can trust. To access free resources, schedule a consultation, or subscribe to my newsletter please visit http://www.pamelaclarkonline.com. Until next time!

 

Managing Behavior through Environmental Change

By making simple changes to the environment, you can often accomplish amazing improvements in problem behaviors. When referring to environment, social exchanges are included in the discussion, as well as the physical habitat and diet. You are part of your birds’ environment. The term includes anything and everything present in the environment that can impact the parrot’s behavior.

Environment Changes = Antecedent Changes

The natural science of learning and behavior is over a century old. By studying how behavior “works,” we have discovered very positive and humane ways in which to change it. One of the best relies upon making changes to the bird’s environment. In the science of applied behavior analysis, these types of changes are referred to as antecedent changes.animals-3618625__340

Such changes enable us to make undesirable behavior less likely and to make desirable behavior more likely. They are essential to “setting the parrot up for success,” when teaching new behaviors or strengthening existing ones. Antecedent arrangements determine which behavior the animal is most likely to perform. Essentially, they can be thought of as simply the management of behavior.

The huge value of positive reinforcement training (which includes clicker training) is now more commonly recognized and understood as one of the best ways to improve an animal’s behavior, as well as to teach new ones. However, antecedent changes are equally useful and can serve as stand-alone interventions. When you couple skillful arrangement of antecedents with the use of positive reinforcement, there are few limits to what you can achieve.

Ethics of Behavior Change

Antecedent changes are one of the most positive, least intrusive ways to change behavior. They often increase quality of life for the bird, in addition to making the owner’s life easier. They help to build a more trusting owner-parrot relationship.

This is important. When dealing with our parrots’ behavior, we must do so in an ethical manner. There is no room for forceful intervention, such as the frequently recommended advice to restrain a parrot until he stops resisting. For any who would like to delve further into the ethics of behavior change, please read the article by Susan Friedman, Ph.D. titled What’s Wrong with this Picture? Effectiveness is not Enough.

What Behaviors Can Be Managed?

The first key to using this behavior management strategy is to begin answering for yourself these questions:

  • What might make it easier (or more likely) for my bird to perform the behavior I want to see?
  • What might make it less likely that my bird will perform the problem behavior?
  • Does my parrot react to me differently when in different locations around the house, when perching at different elevations, or when others are present?

When we choose to live with very intelligent, sentient animals like parrots, we must be problem-solvers. parrot-55293__340Making use of antecedent (environment) changes helps greatly. This type of behavior modification also makes life easier for us. We don’t have to get caught up in telling ourselves stories about how the parrot feels or what he wants. We just make simple changes, then evaluate the resulting behavior. If not effective, we try another possible change.

The following are some real life examples of how well this type of strategy can work. I’ve used common problems voiced frequently by clients, as well as those from my own life with birds. These are organized according to the suggested questions above.

What might make it easier for my bird to perform the behavior I want to see?

Example #1: A Meyer’s parrot sustained an injury, received medical treatment and pain medication and was back at home, but losing weight. download (14)His owner, when home, observed him readily climbing down lower in his cage to access his food dish. Thus, pain (causing a reluctance to move) did not at first appear to account for the weight loss.

I suggested the possibility that he might not be as motivated to climb downward in her absence (a different environment). He would not have the stimulation of her presence to energize him, nor the distraction of her presence that might allow him to disregard his discomfort.

Antecedent Change: We moved the food dishes up right by his favorite perch and he regained the weight he had lost. We have no way of knowing whether this particular change, some other factor, or all changes combined, caused him to gain weight again. However, I offer this example to make you think. Parrots often behave differently when you are not at home.

Example #2: A similar example concerns the challenge many small birds pose when we try to improve their diet from a seed mix to formulated foods. Cages sold for these species always have the food dishes located down near the bottom of the cage. This means that getting to the food requires effort for the bird.

Antecedent Change: Place the new foods into additional dishes right up by the perch the bird uses most, leaving the seed mix in the dish down low. This is an example of decreasing the response effort. We make it easier for the bird to eat the new food because doing so requires less effort than does climbing down to the bottom of the cage.

Example #3: Many parrots do not readily interact with enrichment or consume fresh vegetables or fruit. bird-1941481__340These activities can be encouraged through their skillful placement. As the photo shows, placing a chuck of fresh food in a novel place often encourages consumption more quickly than simply leaving it in the food dish. I increased my own parrots’ consumption of pellets by offering them on play stands, in addition to their cages.

When placing enrichment, stand back and evaluate how the parrot uses his cage. I see cages with toys on the floor or in the lower third of the cage (where parrots usually don’t spend much time). I see toys in spots where it would take a great deal of effort for the bird to use them. I see toys that are completely inappropriate to the bird’s size, rendering interaction impossible.

Antecedent Changes: (1) Place the toy at a spot in the cage where the bird spends most of his time. Make sure that he can access it easily from that perch. (2) Hang it from the ceiling of the cage at beak level. It takes more effort for a parrot to bend over to interact with enrichment. (3) Place it where it’s not likely to bang into any part of his body when he turns around. (4) If it’s wood to chew, make sure that it isn’t too hard or too thick for him. (5) Use the information you have from previous behavior to inform your choice about what you provide. For example, if he chews up your junk mail when you leave it around, try a first toy made out of paper.

Example #4: Many clients complain that their parrot isn’t motivated to earn treats (preferred foods) when they attempt training.

Antecedent Changes: (1) Increase the value of the food treats you are using by only offering them when training and at no other time. (2) Try training right before a meal when motivation might be higher. (3) Eliminate any distractions, like other people or animals, in the training environment that might make your parrot less likely to focus.

What might make it less likely that my bird will perform a problem behavior in a particular set of circumstances?

Example #1: I once had a quaker parakeet who was fiercely “territorial” around his cagedownload (16) – meaning that I had a hard time interacting with him or changing out food dishes when he was near his cage because he would bite with ferocity. Luckily, he had a good recall and would fly to my hand whenever called.

Antecedent Change: Rather than trying to service his cage or asking him to step up when he was there, I instead would open his cage door, step back, cue him to fly to me, and put him on a play stand, which allowed me to interact with him easily or to service his cage while he was on the stand.

Example #2: 050One of my greys takes great pleasure in testing gravity by throwing my pots and pans down from my pot rack. She is also a genius when it comes to finding her way into my kitchen cupboards when I am not looking. A normally patient person, these behaviors turns me into a crazy woman. (I came inside recently, after taking my dog for a brief walk, to find my kitchen counter and floor covered with a mixture of baking soda, cocoa powder, ramen noodles and soy sauce.)

Antecedent Change: The most obvious and simplest change would be just to store my cook pots in a cupboard, preventing that problem entirely. However, I live in a teeny, tiny house with little storage space. So, I recently found a way to use different hooks that make it harder for her to enjoy that type of fun. To resolve the second issue, I installed child proof locks on my cupboards. Scolding her for either behavior would have only rewarded her by giving her social attention.  Often, preventing problem behavior is the very best solution.

Example #3: A frequently voiced problem is that of the parrot who bites when you try to change out food bowls. I used to live with a Blue and Gold macaw who was like a rocket, charging through his food dish openings in an attempt to get to me, when I tried to feed him from the outside of his cage.

Antecedent Change: I solved that problem by offering a large treat very near a high perch on the opposite side of the cage. Anyone can do this. Place a second bowl up higher in the cage. When you are ready to change out dishes, place a valued food (that will take a minute or two to eat) in there. This will lure the parrot up to that dish, leaving you safe to accomplish your task. By repeating this every time you feed, you will soon have a parrot who stations while you feed.

Example #4: A client complained that her parrot would snatch her stud earrings out of her ears when she was holding him.

Antecedent Change: Take off the earrings before you hold your bird.

Does my parrot react to me differently when in different locations around the house, when perching at different elevations, or when others are present?

Example #1: Many parrots step up readily when perched at chest height, but are more reluctant when perched over the owner’s head. imagesCAUSHIDZOne cause can be that parrots, by nature, are much more comfortable stepping upward and forward, rather than downward.

Antecedent Change: Slowly get up on a step stool in a manner that doesn’t frighten the parrot and then ask him to step upward onto your hand. He will be much more likely to do so.

Example #2: Another of my greys occasionally chooses to perch around the house at spots down a bit lower, like the top of my step stool or the door to the dog crate. He often solicits head scratches from me while there, but I have learned he is a lot more likely to deliver the  “Congo Grey Sucker Bite” when I am taken in by this “false” invitation. He never does that when he is perched up higher. Note: I don’t have to figure out why he displays this odd difference in behavior in certain spots in order to solve the problem.

Antecedent Change: I ignore his solicitations to pet his head when he is perched lower on one of these spots. (I don’t want him there anyway so should not reward that behavior.) Instead, I readily provide head pets when he is on his cage or a play stand and more likely to be a gentleman.

Example #3: A client complained recently that her parrot would vocalize obnoxiously non-stop when she worked in the kitchen, even though he could easily see her from his cage.

Antecedent Change: Put a table top perch in the kitchen and bring him in to supervise. They can socialize a bit and she can take that opportunity also to offer fresh vegetables as a snack. This simple change caused her to pronounce me “a genius.” We can all be geniuses if we learn to think in this manner.

Example #4: A cockatoo, pair-bonded to the woman in the home, bites anyone who tries to sit on the couch with her when he is near.

Antecedent Change:  Keep the bird in his cage or on a nearby perch when you are sitting on the sofa.

The Process

Managing behavior by making antecedent changes is really just a matter of using common sense and brainstorming. First, identify and describe in detail the behavior you want to change (increase or decrease). Then, brainstorm as many environmental modifications (antecedent changes) as you can think of that might create the change you desire, even if some seem pretty silly or unlikely to work.

Next, try first using the one you think most likely to work. After a few days, step back and evaluate. Have you solved the problem? If not, go on to try the next most likely.

Some solutions are so effective and simple, they might appear suspect. For example, if a parrot bites or chews on your clothes when on your shoulder, simply deny him this privilege. One small change solves the problem with little effort.

In other situations, finding a solution can take many attempts.  I have a client in Jordan with a mechanically inclined cockatoo who delights in leaving his cage to take the top panel off of the radiator. We have worked hard to teach stationing, but the radiator fun apparently is very reinforcing to him and resistant to change. Obviously, that training needs to be continued, but due to the possible danger, we also tried some antecedent changes.

We put a blanket over it when not in use. He moved the blanket. We tried putting an object on top that he hadn’t seen before, thinking that might make him less likely to go over to that side of the room. He didn’t care. We are left with the only option possible – to use additional hardware to screw the top in place and prevent the behavior completely.

Summary

Parrots are a joy and a challenge. Managing their behavior can press us to our limits. However, doing so can be a lot easier than you imagine. digital-art-95075__340You can learn to do this!

Make first and frequent use of antecedent changes. Once you have the knack of arranging the environment to get the behavior you want, go on and learn how to use positive reinforcement to  maintain desirable behaviors and teach new ones.

Don’t blame your parrots for being “difficult!” Instead, have some fun trying to create behavior changes. When you do, always remember to be kind. You can use what you learn on partners and children too!

Thank you for reading my blog. I am Pamela Clark, an IAABC Certified Parrot Behavior Consultant and licensed veterinary technician. My passion is helping people with parrots. To access many free resources or subscribe to my newsletter, please visit me at http://www.pamelaclarkonline.com. Until next time!

Resource and Suggested Reading List (these are not parrot-specific because the same rules for behavior change are the same for all species):

Don’t Shoot the Dog!: The New Art of Teaching and Training by Karen Pryor (revised edition, 2006)

Good Bird! A Guide to Solving Behavioral Problems in Companion Parrots by Barbara Heidenreich (2012)

How Parrots Learn to Behave by Susan Friedman, Ph.D. and Phoebe Greene Linden (2003)

10 Things Your Parrot Wants You to Know about Behavior by Susan Friedman, Ph.D.

Blog post by Eileen Anderson on her site eileenanddogs  – What’s an Antecedent Arrangement? .

 

Pellets: To Feed or Not to Feed

Parrot nutrition is a special area of interest for me and one about which I am fairly passionate. The foods that a parrot eats will literally determine his experience, physically and emotionally, throughout his life. photo-1436902799100-7eb776a61f79

What we are doing as a population of bird owners is not working. Too many parrots are diagnosed daily with malnutrition and the often fatal illnesses that result. As a veterinary technician, I have seen it too often.

I also know how hard bird owners work at feeding a healthy diet. But it’s not an easy task. Information found on the internet results in both confusion and frustration. Too many websites voice strong opinions without citing sources or even acknowledging authorship in some cases.

And, parrots offer their own set of challenges. Adult parrots often don’t accept new foods readily. Second, they are biologically “programmed” to consume high energy (high fat) foods before consuming others that may offer better nutrition and more fiber. This can make them resistant to eating lower fat foods if both are offered in plenty. (Molukwu, M. 2011)

I will tell you up front that I am a strong advocate of feeding pellets – not as 100% of the diet, but as a wholesome and beneficial staple in the diet. downloadIf you are staunchly opposed to feeding pellets, then please do not read on. This is written for those with an open mind. On the other hand, if you are undecided or wish you could get your parrot to eat pellets and can’t…then this blog is for you.

Nutrient Requirements for Parrots

I once again just recently researched published scientific information about parrot diets. It is still true that the best minds don’t know for certain what the best diet is for any parrot. They readily admit this. “Few nutrient requirements have been derived scientifically for companion birds, so nutrient requirements are based on the best guess from galliforms [chickens, ducks, turkeys, Japanese quail]”. (Orosz, S. 2006)Photo by Kris Porter

“Companion bird nutrition has virtually no tradition. In the last fifteen years progress has been made in the area of pet avian nutrition. As companion bird popularity increases, interest into researching nutritional needs has surfaced. There is still a relative lack of research information due to lack of funding, need to research “natural” diets, and the difficulty in duplicating nutritional needs in captivity.” (Ritzman, T. 2008) It is now ten years after that was written, and progress in growing our knowledge has been slow.

In the face of such a lack of knowledge, why would anyone adhere so strongly to their own prejudices that pellets aren’t important to a balanced diet when most veterinarians advocate their use so strongly? Significant advances in parrot health have been seen since they were introduced. Yet many do.

Let’s take a look at the many aspects of feeding pellets, so that you can make up your own mind about the correct choice: Should I feed my parrot pellets, or not?

The Default Diet

First, I contend that we all need a “default” diet. By this I mean a diet that our parrots will eat that we can pour out of a bag. Serving other foods can be good for adding variety into the diet to ensure nutritional balance. However, the day may come when some problem prevents you from following through with your usual parrot food preparation plans. In times of disaster, we need a food that we can serve quickly that will support good health.

This “default diet” is going to be either a seed mix or a formulated diet. If we want to protect our parrots’ health, we can’t feed seed as the main dietary staple. Not only does daily consumption of a seed mix lead to malnutrition, it sets the parrot up to develop diseases like obesity, lipoma development, atherosclerosis and fatty liver disease.

Problems with Seed Mixes

Seed mixes are deficient in 32 essential nutrients. They are very low vitamin A, which is essential  if the  immune system is to function correctly. If it does not, illness results. Seed mixes also lead to calcium deficiencies, which can put a bird’s life in peril. Many egg-bound birds who lay soft shell eggs do so because of the seed mix they eat.images (7)

Feeding a high-fat diet can also contribute to behavior problems. Dr. Jamie Lindstrom explains: “As we provide these high carb, high lipid diets, we’re also providing these birds with high energy. If the parrot has insufficient opportunities to expend this energy, it leads to some of the aberrant behaviors, such as screaming and biting, that we see in these birds.”  (Lindstrom, J. 2010)

Fatty foods give the parrot more energy, which may be channeled into biting or screaming. With one client years ago, I improved a screaming problem simply by converting a Scarlet Macaw from a seed mix to pellets and vegetables. That wasn’t the sole solution of course, but that change was crucial to long-term success. It is also thought by many that high fat diets contribute to increased “hormonal” behaviors, such as cavity seeking, intense bonding with one person in the family, paper shredding on the bottom of the case, and territorial aggression. (Hoppes, S. 2018)

In Defense of Seed Mixes

Some defend seed mixes by pointing out that pellets have been mixed with the seed or that vitamins have been sprayed on the outside of the seeds to create a “balanced” diet. However, whether a diet is deemed balanced or not depends upon what that bird actually eats. When given the option of seeds vs. pellets, parrots usually only eat the seed. When vitamins are sprayed on the outside of seeds, this also does nothing to balance the diet. Parrots hull all of the seeds they consume. Thus, the added vitamins wind up on the floor of the cage with the shells. “For the supplement to be effective, it must be consumed in proportion to its presence in the mix.” (Brilling Hill, Inc. 1996)

Even if the attempt is made to balance a seed mix by feeding table food, the fact still remains that seed mixes contain too much fat for the average parrot. Adding table food can make this worse, as most Americans do not eat a low-fat diet. There really is no valid argument in favor of feeding a seed mix as the chosen dietary staple. That leaves us with the option of feeding pellets  (formulated diets).

Types of Formulated Diets

Formulated diets come in three types. Two of the types are typically lumped together, being described as “pellets.”  The third type is manufactured by combining seeds and pellets into one product. An example would be the Lafeber Nutriberries and Avicakes.

 Pelleted or Extruded Diets

Not all pellets are created equal. There are two methods for manufacturing a “pelleted” diet. The first creates an extruded nugget.  An example of this type would be Zupreem or Pretty Bird. Some extruded products contain sugar, which makes them a favorite among many parrots. Some say that it is easier to convert a parrot to an extruded nugget, but I have not found this to be true.images (8)

Extruded diets are manufactured by forcing a mixture of dry, ground ingredients and water through a die under high pressure and high temperature. The higher temperatures required to produce extruded diets may cause more nutrient depletion than happens with pelleted foods. In either case, nutrients that break down under higher temperatures are then added back into the product to ensure that nutrient levels are met. (Brilling Hill. 1996)

Extruded diets often, but not always, contain chemical dyes that are made from petroleum. It has not been substantiated definitively that food dyes cause behavior problems or allergies in children. However, many swear that this is the case. Choose a product without artificial coloring if this is a concern of yours.

True pellets, on the other hand, are produced by adding steam to a mixture of dry, ground ingredients and then forcing this through a die to create the shape. Generally, they are produced under lower temperatures than are extruded nuggets. Some pellet brands are organic and non-GMO. Ingredients may be less finely ground and there may be more whole-food ingredients listed on the label. Harrison’s is an example of a pelleted diet.

A word of caution: You can’t choose a pellet simply by reading the ingredient list. Organic, non-GMO, and a variety of ingredients are all good claims. However, you must also ask yourself what person or body is behind the product.

Who formulated the product? Do they have a degree in nutrition or other pertinent education? Was any research done during the formulation? Any feeding trials performed?  Do they claim that the pellet is a complete diet? If the company cannot willingly and happily provide you with this information, you should consider another choice.

Arguments Against Feeding Pellets

Let’s look at some of the arguments often given for not feeding pellets:

Argument: Pellets are too dry and can contribute to a “dry crop mix” if the parrot doesn’t drink enough water.

Answer: I have never seen or heard of such a case. Parrots in the wild consume many foods, including soil, that vary widely in moisture content. It is likely that they readily adjust their water intake to account for this. If a parrot is ill or is prevented access to water, this could be an issue. However, consuming pellets poses no risk to a healthy parrot.

Argument: Pellets are boring.

Answer: They are to us. We can’t know how our parrots regard them. In any case, I’m not sure that parrots expect their food to be exciting. That said, this is why it’s a good idea to offer a variety of vegetables, limited fruit, whole grains, and legumes.

Argument: Pellets do not allow for natural foraging behavior.

Answer: They do if you include them in foraging toys and other foraging opportunities.

Argument: Pellets cannot possibly meet the nutritional needs of all species of parrots kept in captivity.

Answer: This is probably true, especially for those species who forage from a huge selection of plant materials and invertebrates in the wild. However, it’s no reason not to feed them. They offer balanced nutrition. It’s up to us to supplement the pellets with enough healthy variety as described above to make sure that we get as close as possible to offering a balanced diet.

Argument: Pellets are not palatable so parrots don’t like them.

Answer: Not true. This argument is the result of incorrectly interpreting behavior. Many people conclude this after offering pellets and finding that the parrot won’t eat them. Introducing pellets has to be done correctly to ensure acceptance. You can’t offer a choice between seeds and pellets and then conclude that the parrot doesn’t like pellets. This is like offering a two-year-old a choice between broccoli and ice cream. Further, if a parrot hasn’t seen pellets before, it may take several weeks of offering them before he accepts them.  

Argument: Eating pellets leads to iron storage disease (hemochromatosis).

Answer: True… IF your parrot consumes moderate quantities of both pellets and citrus fruits or juice. Parrots do not need dietary iron and too much iron absorbed from the diet can cause a health risk. The ascorbic acid in citrus fruit causes increased absorption of iron from the diet. There is no need to feed citrus fruits and they are best avoided in a pellet-eating parrot.

Argument: Veterinarians only recommend pellets because they make money off of them.

Answer: This is so ludicrous it doesn’t even merit a response.

Argument: Eclectus parrots develop toe-tapping and wing flipping if you feed them pellets.

Answer: Actually, these behaviors cannot be blamed solely on pellets or vitamin supplementation.  (Desborough, L. 2014)

Argument:: Converting my parrot to pellets is just too hard; he never eats them.

Answer: He will if you introduce them in the right way. Read on…the next section is for you.

But first, an additional argument is often presented. Why feed pellets at all?  Why not just offer a healthy variety and allow the parrot to choose which foods he needs? GreyIn theory, this should work. In practice, it does not. I can assure you of that from my own personal experience. In addition, “a self-selected diet in African grey parrots (Psittacus erithacus) resulted in a diet that was deficient in a total of 12 dietary components consisting of vitamins, minerals and amino acids. (Orosz, S. Lafeber.com)” For most species a combination of a formulated diet (50-80%) is ideal along with fresh vegetables, fruits, legumes, and other appropriate fresh foods.” (Ritzman, T. 2008)

 Converting the Seed-Eating Parrot to Pellets

 Let me reassure you about two things. First, I have never been unsuccessful in converting a parrot from seed to pellets. Second, I have never found it necessary to make the parrot hungry in order to accomplish this goal. If pellets are introduced correctly, your parrot will choose to eat them. The following is a foolproof method for getting your parrot to eat pellets:

First, make a chop mix for your bird. You may already have heard of “chop.” (While some lay claim to this idea, some version of it has been around for a long time.) Chop.FBWhole grains are cooked, then mixed with finely chopped vegetables and other items. The mix is frozen and then defrosted for feeding. It’s a good way to get a lot of variety into a parrot’s diet and offer a foraging experience. Here is an excellent article about making chop.

The only way you can screw this idea up is by including too many “goodies” (nuts, wheat-based pasta, dried fruit, etc.) into your mix. It should include only grains as close to nature as possible and a wide variety of vegetables. Other healthful additions might include flax seed, pasta made from legumes, sprouts, etc.  Using the chop mix to convert the parrot to eating pellets works extremely well for birds who are used to being offered variety.

Once you have created your chop mix:

  • Measure the amount of seed mix consumed each day.
  • Mix this into an equal quantity of chop mix; offer this on a daily basis. (Your parrot will need to forage through the chop in order to eat his seeds. If he won’t go near the dish, then you will need initially to offer a small quantity of seed in a separate dish so that he doesn’t go hungry.)
  • At the same time, begin to offer in a separate dish a good-quality pellet. Don’t worry if he doesn’t eat them at this time. Feed fresh pellets daily in a small quantity (two or three) until he starts to eat them.
  • When you observe that he is eating some of the grains and vegetables, start reducing the amount of seed you mix into his chop. (You can reduce the overall quantity of seed by as little as one teaspoon a week if he is slow to eat the chop. Or, you can reduce it more quickly if he eats the chop mix readily. Take your cues from your parrot. Go as slowly or as quickly as he needs, but continue to steadily reduce weekly the amount of seed you put into the chop.)
  • Drumroll: At some point (once the quantity of seed mix offered gets to the point where he can no longer rely on it to meet his nutritional need for dietary fat) he will begin to eat the pellets. You won’t have to do anything else to encourage him to eat pellets.
  • Once he is eating the pellets well, completely eliminate the seed mix from the daily diet. Give it to the wild birds or use it to reward different behaviors that you ask him to perform.

Please note that this method is intended for species other than budgerigars and cockatiels. Generally, veterinarians recommend feeding these species fewer pellets. I convert these birds first from seed to Labefer Nutriberries and Avicakes, then add in a smaller quantity of pellets. This method has been most successful.

There are other ways, of course, to successfully introduce pellets to parrots. However, if I make this blog any longer, no one will read it!

Feeding Other Foods

If you do offer other foods in addition to the pelleted or extruded diet, you may change the nutrient balance of the diet as a whole, which could be problematic. This only becomes a serious problem if you are adding in seeds or nuts. As previously stated, parrots will eat high fat foods in preference to formulated foods. The best practice is to reserve any treats, whether seeds or nuts or cheese, for use in reinforcing behaviors that you have asked the parrot to do.

If you supplement with fruits and vegetables, you are less likely to upset the total nutrient balance of the diet. These foods are high in water content, so even if they make up a high proportion of dietary weight, they have a relatively small influence on the balance of nutrients supplied by dry pellets or extrusions that contain much less water.  (Brilling Hill, Inc. 1996)

Veterinarians generally recommend that formulated foods make up between 50% and 80% of what is consumed. My best advice is to consult your own veterinarian as to what brand and amount to feed.

A Few Cautions

If pursuing a diet change, please weigh your parrot regularly to guard against weight loss. This is easier than trying to figure out what the parrot is actually eating. (An exception to this would be if your veterinarian has recommended weight loss for your parrot and is monitoring your progress with this.) Otherwise, weigh your parrot once or twice a week. You can use a good-quality kitchen scale. Alternatively there are many websites that sell scales with perches.

You should also be monitoring the droppings as an added precaution. What goes in must come out. If you have more than one bird in the cage, please also increase the number of food dishes. You should eliminate any competition for food as the diet conversion is completed.

Sources:

Brue, R. (1997) Nutrition. In: D. Zantop, abridged edition, Avian Medicine: Principles and Application. Lake Worth: Wingers Publishing, Pages 23-46.

Brilling Hill, Inc. for Veterinary Practice Publishing Company. 1996. Nutrition of Psittacines (Parrot Family.) [online] Available at: https://www.marionzoological.com/docs/NutritionPsittacines-1009.pdf

Dr. Sharman M. Hoppes, DVM, Dipl ABVP. (2018) Reproductive Diseases of Pet Birds. Merck Veterinary Manual. [online] Available at: https://www.merckvetmanual.com/exotic-and-laboratory-animals/pet-birds/reproductive-diseases-of-pet-birds.

Clark, P. Dr. Jamie Lindstrom (2010) Telephone interview: The Link Between Diet and Behavior.

 Desborough, L.  (2014) Toe-tapping in Eclectus Parrots. [online] Available at: https://eclectusparrotcentre.com/contact/toe-tapping

Molokwu, M and Nilsson, J and Olsson, O. (2011) Diet Selection in Birds: trade-off between energetic content and digestibility of seeds. Oxford University Press for the International Society for Behavioral Ecology. [online] Available at: https://academic.oup.com/beheco/article/22/3/639/269921

Nijboer, J. (2018) Nutrition in Psittacines. In: Merck Veterinary Manual. [online] Available at: https://www.merckvetmanual.com/management-and-nutrition/nutrition-exotic-and-zoo-animals/nutrition-in-psittacines

Dr. Susan Orosz, DVM, DABVP, DECAMS. (2006) Avian Nutrition Demystified. In: North American Veterinary Conference Proceedings, Volume 20. [online] Orlando: IVIS. Available at: http://www.ivis.org/proceedings/navc/2006/SAE/565.pdf?LA=1.

Dr. Susan Orosz, DVM, DABVP, DECAMS. Date unknown. Avian Nutrition Revisited: Clinical Perspectives. Pet Birds by Lafeber Co. [online] Available at: https://lafeber.com/pet-birds/avian-nutrition-revisited-clinical-perspectives

Dr. Tracey Ritzman, DVM, DABVP. (2008) Practical Avian Nutrition (Proceedings). CVC In San Diego. [online] Lenexa: UBM Animal Care. Available at: http://veterinarycalendar.dvm360.com/practical-avian-nutrition-proceedings