DON'T lock him in the bathroom. When my corgi was a puppy we used the bathroom as her "kennel" by putting a baby gate at the door. One day (the night before my Father-in-law passed away no less) she chewed through the water line that led to the toilet. We came home to spraying water. It was on the 2nd floor and the water ran through the air ducts down to the bottom floor. It was 11:00 at night but we still went to the neighbor and woke him up to borrow his shop vac. thank goodness for good friends !! If you don't already have it, get one of the older style kennels with the plastic body and metal bar "windows" and door for the dog. that may contain him better and not allow him to reach things outside the cage.