I have a 65 lb boxer sharpei mix that chews straight through any crate we put him in. He has severe separation anxiety and destroys the house when we leave, so we have to crate him. But there's a problem, he can chew his way out of all of them. His latest break out involved making his way to the bookcase and chewing up everything he could reach. We are at out wits end and need a way to keep him contained while we leave!! Does anyone know anything that could help?