I've had my male Syrian hamster for nearly four months, he has a big home with a wheel, three hide aways, tubes and I scatter feed him so he has to look for it and get active. He use to come up to me and go in the ball and take treats from me. I've started to get him use to being picked up and he bit my hard and drew blood. I've started to use the bathtub bonding technique and was going well but he started screaming. I've given him space but now he doesn't come near me. He won't go in his ball or take food from my hand. What can I do to get him to trust me, it's upsetting me alot that he doesn't like me and I know he can pick up on it.