My cat opens our bedroom door. Mike and I turned our door around, long story short, but it doesn't close the normal way. To keep the door shut, we have a hook and eye lock. We lock it every night before we go to bed, but our kitty figured out that if he puts his paw under our door, hooks it around, and shakes the door hard, he can jiggle the hook out of the eye in the lock and get into the room.