Thank you oodlesofpoodles. I just wanted to add here, as I think I forgot to mention it before.

Know what springer rage is? Its where the dogs eyes glaze over and they attack someone for no reson and they have no idea what they did and they completly loose controlle, well thats atleast my understanding of it. I beleave that Chewy has some thing like springer rage. His eyes glaze over and nothing will stop him from biteing. I don't personally think this is a behavioral problem I think it is a genes problem type of thing. I will be consolting with my vet to see if there is a test he can do or if there are any medicines which can help him, I asked the otehr vet who Chewy saw once and he said no, and now that I think about it I never asked my vet so I'm going to ask him. I thought that might help you more understnad our problem, now we are going to still go to the trainer.

Ash