by Michael » Fri May 20, 2011 7:21 pm
Let's say that there are three main reasons for food management and then we can look at how they can be applied:
1) Prevent over eating and obesity related health problems
2) Reduce hormonal behavior related to abundance of food (triggered my environmental factors)
3) Behavior motivation (training, taming, and interaction you may not realize if food motivated)
Strictly for the purpose of preventing over eating, it would just be a matter of providing food 2-4 times per day for extensive periods of time but not leaving it available all the time. Diluting the diet a little bit may also help. Yes, most parrots are on poor diets but some people end up getting so worked up about it that it can be too rich. This will vary by species but I know with my guys that giving them a load of veggies for dinner instead of pellets is like giving them a reduced size portion of pellets. After eating veggies (and stuffing their crops full for that matter) they end up being more hungry come next training session and after eating pellets. So obviously most people need to improve their parrot's nutrition but for people who have them on a very rich pellet diet and feeding it all day long, it may help to reduce that a bit.
Now for training, we can look at different levels of hunger motivation required to overcome the difficulty of the task. From observation of my own parrots, this is how I see it:
1) Taming - Requires the least motivation (unless the bird is in the early stages and terrified) because things like opening the birds wings or touching its tail don't require it to spend any energy. It simply needs to overcome its fears and a little bit of treats helps. Few treats go a long way so treats alone and not eating immediately prior is sufficient.
2) Maintaining known tricks/behaviors - This requires some more motivation because it involves spending energy but since the bird already knows what to do, it may not have to be that hungry to do it a little bit for a scratch or a treat. For getting a parrot to do some known tricks or taming, making sure it didn't just eat and using a nice treat is usually enough if you're not going to repeat many times.
3) Basic trick training - Teaching to target, wave, shake, etc requires a bit more motivation than taming. The parrot actually needs to remember the behavior performed to get the treat. Also it has to spend a little energy like picking its foot up. For this kind of training, taking the food out 3-6 hours prior to training will usually suffice.
4) Advanced trick training - Teaching tricks like puzzles, matching colors, etc requires a lot of attention and motivation. I've noticed with Kili that even thought she knows the tricks, if she isn't hungry enough, she gets it wrong much more. However, when she is more hungry, she performs with better accuracy. Too hungry of course also hurts training because the bird becomes over zealous for the treats and tries all tricks in desperation and doesn't learn either. It's all about finding the optimal middle ground. For this point you'll almost definitely want to be doing twice daily feedings and building up enough time in between for there to be hunger at training to pay attention to tougher tasks.
5) Flight Training - Now the energy expense becomes so great that motivation must be high. If you want to do a lot of flight training to give the bird exercise as well as practice, it will have to be very motivated. Yes, you can get a few recalls out of a well trained parrot that just wants to hang out with you or a toy. But for the training process and for any extensive amount of flying, a bit more hunger will be needed. This is when you begin using weight management by weighing the parrot before and after meals and learning to adjust them to hit a target weight by training time. This will typically involve getting the parrot to 10-20% below free feed weight. However, I don't like using a derived number as a target weight. I just use this is a ball park and find the best weight through trial and error. I'll see what weight the parrot is prior to training on the first day, then give a little less the next day and weight at training, and less and less this way until I find which weight gives me optimal motivation and what amount of food gets me there. I use other tricks (usually something tough like puzzle or ring on peg) to test motivation for flight.
What I posted above is somewhat flexible and will depend largely on the bird. Just because I said taming can use the least food management, doesn't mean that for a certain bird it won't require twice daily meals or that some people can flight train a parrot on favorite treats alone. More importantly I showed the progression of the extent of food management. It is safest to begin with the least limiting ones and experimenting your way down the line. As long as you have a scale and can verify that your parrot is maintaining a healthy weight, it is ok to work your way down the line.
For parakeets it may not be advisable to go too far down the line on this scale because they have faster metabolisms and withholding food for 3-6 hours and millet could be enough to motivate them to do anything. So if you're thinking of flight training your cockatiel... experiment with lighter food management and find the amount that will get him to fly to you automatically when you hold a piece of millet. Don't use any more extensive food management than that and don't lure him. Teach him to target and target recall him for the treats. Proceed to a variable ratio of reward slowly but that way you can make a little hunger go a longer way.
Variable ratio reinforcement is probably why I get away with less extensive food management with Kili now than I used to use. To get her to learn the stuff, I needed the motivation to try 20-40 reps a day. But with variable ratio and the fact that I'm mainly just practicing/maintaining behaviors, instead of using 30 treats, I can get her hungry enough for just 10 treats and get just as many if not more behaviors out of her. The alternative to more extensive food management during the earlier stages of training is greater patience. Get them hungry enough for just 10 treats, practice 10 times a day and it takes 4 weeks instead of 1 week to teach the same thing. However, there comes a point where there just isn't enough motivation to learn it no matter how long you practice or the behavior falls out of practice because you don't do it enough.
Training prior to feeding is a very good idea because then there's no limit (practically) to how much treats you can use during the training session. You or the bird will lose interest before it gets full so it can fulfill its remaining hunger during its meal afterward. If you give an unlimited quantity meal until the bird walks away from it, you can be sure it's not going away hungry. This balances out that some days you may use 5 treats for training and another time 20. Well the day it had 5 it will eat more from the bowl and the day it had 20 less. The crop can only fit so much food...
Beyond the basic knowledge we can discuss here, it is highly experimental and it's important to learn by eye how much food will yield how much hunger later on for training. Variable ratio reinforcement helps stretch less hunger and fewer treats for more behaviors. It is important to make adjustments every once in a while and re-test the optimal training weight by easing off and working your way to deriving it again. Since species are different and each individual is different, the exact extent of food management needs to be tested by the trainer. However, there is no doubt that there's a good level of food management for every parrot and that if you do it right, it won't get too hungry or be harmed because it has a crop.