The dog isnt chewing because it particularly wants to destroy its kennel. Dogs chew to relieve tension and stress, the act of chewing releases calming hormones. If the dog wasnt stressed, it wouldnt chew. All dogs need something to chew for this reason, keeps them happy. Obviously however chewing up the kennel isnt good. As has already been said, sounds like the dog needs more training and exercise than its getting. But might also be worth getting it a big rope toy to chew and give it bones now and again. Like i said dogs chew to releive tension, how would you feel if when you were stressed an