We had been using the purina litter boxes with pee pads in, but Tucker decided to start lifting his leg and now he can pee over the top, ugh. It seems like every time I find a solution to a problem, he finds a way to create a new problem. I now have deeper Steralite containers so he can't lift his leg high enough to pee out of it. I'm sure he'll come up with some way to out smart me on that solution, too
Good luck!
Julie and Tucker