It's worth a try. I know the automatic is easier but if Emma is using on the floor it's not of much use to her at all. You can continue to use it for Mau but you may have no choice for Emma. Maybe I am wrong but I figure it's worth a shot and if it works then good. I mean it can't be as much work to scoop a box as what it is to have to clean clothes all over again because Emma has used them for her potty. And besides I think one litter box is just not enough for 2 cats.