We have has rottweilers in the past, so him being a big dog is not a problem. And we are going to try puppy classes. I don't get rid of them because they are big, I'd only sell him if he doesn't become well behaved. I just want to know what to do to get him to stop chewing. I stated that we exercise him regularly. Just not long walks. He still plays outside and runs outside. We do everything else with exercise but walking.