What type of lock do I need to put on diesel's cage? We have a custom built 4x2x2 cage with sliding glass doors. I'm looking to put a lock on it due to my son getting him out last night with no one knowing so when I got off at midnight I had to search for him. Luckily he was asleep under a tshirt that my son took off to go to bed but I don't want to chance this happening again. I'm not sure what type of key lock to get that will still allow both doors to open.