Our new pup likes to chew on his metal crate and we're concerned that it's unhealthy for his teeth/gums. We really don't put him in there for a long time besides to sleep at night. He likes it in his crate too (i.e. come and go freely); he has chew toys in there that we try to get him to chew instead, but most of the time he just goes back to chewing the crate. He'll even chew on the outside of the door of the crate when he's not even in there. Anyone have any suggestions?