Rooster issues

[Mimi1008]

Over the last month of so my rooster has started chasing off one of my hens who was the head hen. She’s a black and white laced whyndotte. He won’t let her near the flock and anytime he sees her he goes after her. Just in the last week he started doing the same thing to another hen. So now they are both banned from the flock. What should I do? When I go out in my yard I don’t allow him to do that to them so they know I’m protecting them and they will come by me. I thought about putting him in a cage for a few days to see if that changes the dynamic a bit. She will run from him when he goes after her but I’ve seen her get low on the ground and stay put and he won’t do her anything but one of the other hens started attacking her. I saw this happen twice in the last week. I chase them off. It’s like the peace in my flock is gone.