We are in a large metropolitan area with likely vets numbering the thousands. But only 4 avian vets and only 2 are really good. I tried to get an appointment with one and was told I couldn't get my sick chicken in for at least four days. I told them she wouldn't make it four days. They said I could bring her in for observation till the vet could see her. I told them I could observe her at home. I took her to the Mizzou vet school for euthanasia and necropsy. She had cancer so wasting time at the vet would have prolonged her misery and cost me hundreds for no good outcome.
On another note I mentioned earlier that humans should think long and hard before taking on care of some exotic animals - especially those that can outlive you and your children and perhaps your grandchildren.
I worked at a macaw rescue, breeding and restoration program in Central America. We had about 400 Scarlet and Great Green Macaws. (yes, it was loud) They should never be owned by people. We had a breeding pair of scarlets that were 90 years old. Many of the rescues were psychotic. Their owners had died and they went nuts. We had a complete bald (except the head) one who would pluck all its feathers as they'd appear.
Most people don't have the means to care for them. If caged, other than a huge aviary, they need very expensive huge cages. Most are kept in too small quarters.
Feeding that many big birds was an arduous and expensive process. We didn't use vets though.