I have one buff rock, a real sweetheart. Anyway, she had been a roo favorite, and got some bare spots. I then put on the chicken aprons and they helped but the feathers wouldn't grow back under there. I now have her completely seperated in a divided cage (3 other hens in the same boat)and had been for two months, but she just won't grow back her feathers back. What can I do to help her? I've been feeding "feather fixer" along with several bugs and beetles I catch every day. What can/should I do about this?