My male cat keeps biting and taking chunks of hair out of my female cat who is very fluffy. He plays rough like that with her and I don’t know how to make him stop. She cries and it obviously hurts her having hair ripped out. I yell at him, put him in a separate room but nothing stops it from happening again. They both are fixed and he’s not trying to mount her. He will bite anywhere, tail, leg, side, etc.