My friend as mentioned above, has at least 11 floor boxes and then there's all the cage boxes. That can fluctuate between 4 or 5 up to lots more in kitten season! What sucks is when they have diareah or when it's a cat who wants to take extra care to cover to the point that they scoop out all the litter out of the box with the poop and all then tip over the box and lie in it!