My George has started getting very rough during play with me. He never used to do it. I wonder if it's my fault as I've been wrestling with him too much and maybe he didn't like it. He bites my hand and when I try to get away, he actively searches for my hands and really tries to bite them like he's possessed. Proper attack on me. I tried making a loud noise, stopping play, hiding my hands, putting him away from me but he hasn't learnt it hurts me. I have to add he never bites outside of play time. Any other suggestions? Maybe he's generally rough as when he plays with Seymour, Seymour often makes noises like he's being hurt.