I have a wild corella coming here, he is smaller than the other corellas and he looks old, dirty and his feathers on his head are missing. The other birds wont talk to him but he is eating non stop. He has been here for a week now and is definitely sleeping less. Possibly an escaped bird who has no gang to hang out with or could he have a disease..any ideas? I dont want to take him to the local wild life refuge because they will just put him down..and I always hope for the best.