I recently got a new rooster as my old cochin was too submissive and getting stripped of his feathers by the hens. The new rooster is a full sized mixed breed. Yesterday was the first day he was out of the cage with the hens. Today I noticed that he attacks one of my Rhode Island reds. He has been going around showing regular dominance with the other hens. But he pushes her right into the corner. I have noticed that she is not squatting for him. He doesn't draw blood but chases her around quite quickly. Is this just him establishing dominance? Or something I need to worry about?