We have a 10 month old staffy, who chews for england. He has chewed through the kids trampoline enclosure, my sofa, the walls, woodwork, and many other things. He has tons of chewy toys, ropes, kongs etc, but seems to enjoy ripping things. I have tried the 'praise him when he is chewing on his toys' thing, but its not made a difference. How can I stop him, we are supposed to be moving into a new house soon, and I'm worried that he will destroy it. help!!!