We have 46 chickens...6 roos, 40 hens. 2 of them are a mix of white silkie/brown leghorn, the other 4 are big brown leghorn roos. The two "boys" as I call them (because they look like they have punk hairdoos) are ganging up and doubleteaming several of the hens. They are wearing the feathers off their backs and one hen had a cut from where they got too aggressive. Is this normal or do I have to lock these guys up? I have a ton of different kinds of hens and only want to breed a few leghorn pullets in the spring so as soon as it gets warmer I'll be moving all the boys to a separate house with the leghorn hens and they will be allowed to free range during the day, but for now I keep them all together to stay warm. Is this doing the hens any harm?