I have a 1 year old roo. All of my other established flock was taken out by predators. In Feb, I got more chicks and introduced the pullets to the roo about a month ago. He has grabbed ahold of 2 of them now and ripped their feathers out so hard- one had Cartledge showing. Today- he got another one. Is this normal behavior? I've introduce other pullets and roo's together and I've never seen such violence. I'm sure he's fraustrated bc he's trying to mount them to no avail. I'm not even sure they are old enough yet.