I wanted to reply to your request for a chicken vet, but the posting wouldn't let me because I wasn't part of the group.
I would try Dr. Daniel Levenson at the Southwest Veterinary Medical Center. He's seen my parrots, and I know he has seen raptors as well, so I think there's a good chance he would also see chickens. He's in Corrales and their phone number is (505) 890-8810. They also have a website http://mysouthwestvet.com/index.php.