The black buff is a roo but was inly visiting the coop he does nit live there. There are 3 hens to 2 roos in the coop, which is one hen too few...ive known since they were young. Cadbury protects marshie more than hurts her all eggy does is mate.Bantambury- the likely problem is that there are just too many roosters for the amount of hens you've got. Looking at that last pic you posted I see at least 2 (and that buff chicken with the black tail in the bottom right corner, is that a rooster too?). Anyway, you should pick one and get rid of everyone else. I've noticed when I have more than one boy, they have a tendency to "gang bang" my lesser dominant hens, leaving them with bald heads and bare backs. The one cockerel probably isn't the only one responsible for her chicken pattern baldness is what I'm getting at. Good luck to you.