have a problem with one chicken who is always missing feathers around her neck and the center of her breast. When I rescued her she was missing these feathers as a result of being pecked on by other chickens. I quarantined her until her feathers returned but once again all of her feathers are missing on her neck. Now she is also missing all of the feathers at the center of her breast, and it is bright red and bare. She does not like to sleep on the roost so she now sleeps in a cat carrier because I thought maybe it was mice or something chewing on her feathers. Any suggestions? Is it possible she is pulling her own feathers out? She does not have mites or lice. I have tried putting different salves on her neck to make it unappealing.