I rescued a beautiful boy 3 years ago after he was found in a backyard very weak. He’s been happy and healthy in an outdoor aviary with other pigeons and a few chickens that are healthy as well. He has been itching his face and has some feather loss on his head and face, but I can see new feathers growing in. He is also weak and not flying around. He just walks around and can jump up into the coop, but not his usual self.....not dancing for his lady friends. I inspected him for mites and lice, but do not see anything. I treated him anyway with a QTip dab of ivermectin to back of his neck 3 days ago but he’s still itching. Today I put some DE on his skin in hopes that might help. He’s eating and drinking fine. Poops look normal too. Any ideas? I’ve grown so fond of this little guy I just want him to feel better.