My roo is almost 3 and we separated him from the hens when he was 1.5 because he overmated them so bad they all had bare backs. And he was stressing them out. We have a very large coop and run, so we were able to separate him from the girls with chicken wire between their spaces. He can still see the hens but he can’t get to them. I’m hoping to reintroduce them eventually when he cools his jets, but the few times I’ve tried he’s back on them immediately. I must say the hens are happier without him constantly jumping them too. Not the most idea situation, but we got the flock as pets so we are committed to keeping them and working out the bumps as best as we can.