Risa, I used to have this problem with my ferrets. I can't really explain why they would move the litter box an poop behind it, but I can tell you how I solved the problem. It was recommended to me that I totally re-arrange the cage every so often. Move the ramps/ladders, shelves, bedding, food dishes, water bottles, and litter pans! EVERYTHING. Completely clean the cage with soap/water or whatever you use to clean. My ferrets stopped using the wrong corners. Now this was not a permenent fix, I have to re-arrange the cage about every 2-3 months. However, it stops them every time. Maybe my ferrets are just wierd, but it's food for thought. Natalie and the *3* furry snakes [Posted in FML issue 3457]