I have one hen that got beat up pretty badly by my rooster (she was his favorite). I re-homed the roo, but it's been a good 6 or 8 weeks, and the feathers on her back have not regrown. She also has a bald spot on her head which has not regrown. I have had to keep Neosporin and Blu-Kote on her head to keep the others from picking at her. (I spray the Blu-Kote into a bottle cap and use a Q-tip to put it on her head, so I don't spray it in her eyes). The bald spot on her back is pretty much covered when her wings are folded. It seems like the feathers should have regrown by now. Does a feather regrow if one is pulled out, or does it only regrow in the next moulting cycle?