Hi there, I'm pretty new to chickens. The finishing touches are being placed on our coop and I've had 4 hens 6-8m old for only a few weeks now. I noticed that one of the hens has a bald/bleeding spot on her back. When I got them, I saw this but it got better. Today it's bad again and one of the other hens is following her around pecking at the spot! Should I separate them? If so how? I don't want one to be miss placed. Any info or insight would be helpful. Thanks!