What can you do for a cat who will pee in the litterbox, but poops outside the box, next to it? I clean the litterbox nearly every day and have to pick the poop up off the floor. When I catch her beforehand, and tell her "no, use your litter box", she will poop in it. She seems to know what she is supposed to do, but doesn't seem to want to do it. Help! She is otherwise a perfect kitty.