The door mat sure wouldn't work in my house! They would never use the box! All four cats are afraid of the doormat on the porch. They leap over it when they're going in and out. Big, who's too fat to be a great jumper, sometimes sits in the doorway, pondering that evil doormat, trying to decide if he really wants to go out bad enough to try to make the jump. Because, after all, if he misses, he might accidently STEP on the horrible thing!