Buckbeak, my 2yo Dark Brahma hen is losing all her feathers without seeming to grow any back. She currently has a secondary Bumblefoot infection, so she's in a crate in the garage. I've gave her 5 1/2cc shots of Tylan 50, went 4 days without, and gave her 2 more shots. The last shot was yesterday. It seems to be working for the Bumblefoot. She suddenly yesterday was sitting in a poof of feathers, which I threw away. They had no sign of mites, or fleas, or eggs, or anything. Today she's sitting in a giant pile of feathers again, and when I picked her up, feathers just came off at my touch. She hasn't laid an 12ish days, but I think that's from lack of sun. Is the Tylan 50 messing her up or something? Should I stop administering it? She normally has very many beautiful feathers in good condition. Thanks for your answers.