I have a rooster in with 8 hens. He keeps picking on two of then to the point they get bald heads, even bloody. I think he must only mate with those two hens or something. They are tuxedos and he is white along with the other hens. It's like he doesn't like the white hens, only the tuxedos. I have already had to separate them to regrow their head feathers once. The are in a 3'x4' pen with an enclosed nest box on the back. They also have a sand box and now 3 little cardboard houses for them to hide in. The little boxes helped a lot, it got them out of his site and a place to hide but he goes after them as soon as he sees them. Any other ideas or do I just need to get them introduced to the other little flock? The other flock had one rooster and 7 hens.