One of our hens (RIR) has a large black wound on her back. We think it may be because she is our rooster's favorite lady, but we aren't entirely sure. We have sectioned him off separately, since a few other hens have balding spots on their backs where he pins them down, but none of them have gaping wounds like the first one. It looks like a cut, but black, with black all around it. It's dry, and I don't see any blood, or any maggots. We're usually pretty good about checking them out once in a while, with out invading their space too much, but I can't give a good estimate of how long it has been there. We are spraying the spot down with iodine, and she doesn't act any different, or at least not any different as far as I can tell (the hubs is the head chicken person around here, and he's out of town). With so many chickens in there (eh, maybe about 12 since we put the youngest batch out with the rest of them) I can't tell who it is, but one or two of our layers aren't laying every day. That could also be because they are getting on in age. I can't keep the rooster separate for long, as I feel he is in too small of a space for his size, and when he's not harassing the hens, he does a good job of keeping them safe. Any idea what it could be? Or how to best treat it? Thanks for any advice!