I don't know what is is with kitties and boxes. Groucho loves them! Maybe it's because they make great hidey places, a wonderful place to play, boxes are snug and secure. One night we ordered take-out from a local pizza restaurant that was delivered in the top of a box. Maybe it was the smell of the food, but Groucho immediately staked his claim to it. When it comes to boxes, it seems that one size fits all kitties. No matter how big the cat and how small the box, cats ALWAYS manage to fit into it comfortably. Cats are so easily amused by the darndest things