Hi there! I have a flock of about 35 hens, several different kinds of breeds. I had too many roosters, and they had developed bare spots. I put breeding aprons On and removed the roosters. Still had spots at two months after. Removed the aprons, two months later, still spots. It's been about 5 months since they lost the feathers on those places. It's not picking because the skin isn't red. I have no idea, please help! (They aren't molting either, or I don't think so)