The only thing I can imagine it being is hormonal . she has yet another vet appointment, this one is with my regular avian vet that I've been working with for years who has been unavailable for a while. She will probably fit her for a chestplate for now and hopefully have some ideas as far as why she is doing this.
Have any of the vets you've seen discussed endorphin rushes.....there has been several theories about companion birds getting cheap highs from feather plucking and from self-mutilation. Why would a bird attack his or her own body? Studies and theories abound. From boredom to allergies to parasites to a euphoric feeling. In the end, though, every case is individual and must be treated as such, usually via a long process of elimination. Every bird has his or her own story to tell – and, for the plucking and self-mutilating birds, the story is rarely pretty or easy to figure out.
Citing P. Jensen, from his work Stress I Djurvärlden. LTs förlag, Stockholm, Sweden (1996); Yasmine A. Bengtson, in her Master of Science thesis writes:
“Under-stimulated parrots have been observed biting their own feathers, not as in grooming behavior, more in self-mutilation….. Gorillas in zoos turn their backs on visitors and eat their own droppings. Mutilation and cannibalism can result from under-stimulation. Jensen (1996) suggests plentiful supplies of fresh hay to distract from this behavior, while the smell and taste of blood intensifies it.” Often self-mutilation is an extension of feather plucking, and it is far more dangerous to your bird. When mutilation starts, many times avian veterinarians will often try antidepressants and look for medical reasons for the behavior. When those fail, the bird is usually fitted with a collar to allow any wounds to heal, potential irritative causes themselves.
In some instances, all that is necessary is to resolve any problems between Pesky Parrot and his human flock or Pesky and other birds or animals in the flock/home or strengthen the bond between them.
There is a relatively new school of thought concerning the cause of plucking and self-mutilation, that the bird has figured out how create, for himself, a self-induced drug high. The pain created by the self-mutilation causes the release of endorphins.
Endorphins are natural pain relievers produced by the body. They are chemicals that calm you, relieve pain and make you feel good. Endorphins have been likened to the opiates of opium, codeine, morphine, and heroin.
Dr. David Spiegel, of Petpsych.com, offers: “…..as twisted as it may seem, by plucking their feathers, they have a reliable way that they can control and deliver feelings of pleasure to themselves. They have essentially learned how to access their body’s drug supply system, though they invariably pay a high price in the damage that they inflict upon themselves.”
Although the current research in this area, with relationship to parrots, is still in its infancy, and needs much more study, the theory is well based. These home-grown chemicals make it easier, in stressful situations, for you to think clearer. Tickling and laughter also release endorphins. If your bird purposely and recurrently injures himself, you can be sure there is something in the environment that needs changing. Are you or someone else int its flock or in the home the root of the problem? Sometimes a bird will stop hurting himself if the problems between Pesky Parrot and his human flock are addressed.
Tuffy, a moluccan cockatoo picked up on the stress that her companion human was experiencing and began mutilating herself while her human and their veterinarian tested and examined, trying to figure out what was causing Tuffy’s behavior. The mutilating had started in late October, 2000. By December she had a hole in her chest about the size of a silver dollar.
"One day I came home and there was blood all over; she had bitten in a vein on her wing and nearly bled to death. So back to the vet, this time to put a collar on her.....nothing seemed to work. Every day it was getting worse, and she was now chewing on her chest. The more she hurt herself, the harder she would chew, high on endorphins that her body released.
My life, and hers, fell apart when my husband and I split up. I guess, now, I know. all the stress I was feeling she also felt. It was too much for her, and she started to chew at her skin, under her wings and legs. Once it was determined that it was a behavioral problem and nothing medical, the next challenge was to design a collar that Tuffy would be happy with.. After about a hundred different designs….. a design was arrived at that Tuffy accepted."