I have a really intelligent cat. Never mind that she chases her tail and plays with plastic bags by diving head first into them. She is learning how to use the toilet successfully. She is really stubborn though. She'll pee in the makeshift litter box I have for her (aluminum roasting pan with a hole that is getting larger by the week) and sometimes she poops in it too. She protests though when I ignore her by pooping on the floor...never on the carpet. If I catch her before she goes she'll jump right on the toilet and do her thing. Usually if I'm ignoring her because she did something wrong or don't wake up and play with her she poops on the floor. I probably should pay more attention to her. Though, this beats using the amt of kitty litter I used every week because she's such a neat freak.