Cat are really finicky when it comes to change. I think you gotta start out with the litter box you're gonna use when you bring a tiny kitten into the household, but when you wanna change having adult cats, it just won't work - at least that's the tail with my cats. If I tried to change the litter or the type of box - all hell would break loose, if you know what I mean. I even have trouble when I move the boxes from one side of the room to the other. I have 4 cats and 2 boxes. They must be scooped every day. All my babies are really good at using them thank goodness