My rooster is attacking my other flock of hens, Roos, and bantams. The other flock is 11 weeks old and he’s been chasing them down and attacking them for the last three weeks. I feel if I wouldn’t intervene he’d kill them. I would understand him attacking Roos but he attacks bantams that are less than 1lb. I’m scared to let my 6wk old hens out from another flock because I don’t trust him. Is this normal or should I get rid of him?