aaahhh...your second post is much clearer than your first--I think everyone (myself included) was getting the picture that you choose to keep him crated except for brief visits out of the crate! It is understandably that you may need to crate him while at work, that's fine...but once home, he should be allowed out since you are there. One option might be to simply close off extra rooms, therefore limiting where he is allowed to go--I keep my bedroom and office doors closed so I can control Gracie's access to other parts of the house when I am home. It is great that you take him places with you, etc..but one thing that is very important, especially with energetic boxers, is EXERCISE--not just a walk around the block, but real exercise--can you take him out and run him, etc to let him burn off some of the pent up energy from being crated all day--an exercised, tired boxer will be much less destructive than one that is full of energy! Its amazing the difference in Gracie's behavior on the days that we go for our "power walk" to the fields and do our "sprints" than on the days when she doesn't get out to burn off all that boxer energy! Also, how old is your boxer--some of his chewing could be related to teething, which he will outgrow. Be sure he has a good "teething toy" to keep him busy (Kong, Cuz...) When he starts to gnaw on something unacceptable, provide him an appropriate alternative. Teaching "leave it" is an excellent idea...he will learn, when he goes for something not allowed, immediately bring him something good to chew, as soon as he lets go/stops chewing the wrong thing, say "leave it" and give him the acceptable toy..