The litterbox is in my roommates closet, and he sneaks in there and comes out with nasty breath. We try to watch him, but we can't do it 24/7. I live in an apartment, so I hate shutting him in my small room. A litterbox with a lid won't keep him away.And the cat is the same size as him, so I can't leave just enough room for the cat to get in and not him. Any punishments or anything I can do to get him to STOP?! (I will not hit him.)