We have a Peking drake, that until recently was fine. A couple days ago though, he started chasing our hens. He doesn't bother the female Peking we have, or really cares about the 5 new ducklings much, but he chases the 5 hens we have al around their coop. The other day he had grabbed one of our little RIRs by the neck and pinned her to the ground, but not trying to mate, just grabbed her and pinned her down. Anything we can do short of getting rid of him?