I hatched 8 cuckoo marans about 4 months ago. 4 hens and 4 roos to add to my 8 older hens. They were the calmest roos I had. I just added them to the general population in the coop and suddenly they have decided to beat the crap out of the hens they were hatched with. I was devastated the other night when I found one they injured so badly, she ended passing away. There were 2 more hens today. I thought they were trying to mate and just go too rough, but I think this is just beyond that. What is going on with them??? Please help