I'm not sure exactly what to do with space and what not....one of the cats will not go in the box when other cats are around, but this time they were not even around....she is scared of all the other cats except Bentley. this isn't Nuit by the way. i'm just frustrated, I know it's not a bladder thing but do to the other cats. she has a box right under the giant cat tree that she has claimed as her own. oh I dunno......