I didn't actually cat-proof our ferret's litterbox. We did the whole cage, to keep the cats out of the food. To start with, our ferret's cage is about 18 inches off of the floor, so we made them a set of stairs to get in and out. When the cat problem appeared, we added a wall to cover the opening (wide but low) with a small hole that a ferret can get through, but not a cat. I'll try for a (dreaded) ASCII graphic... imagine cage up here __________________________ | | | __ |<- board to cover cage door |_______|__|_____________| with hole for ferrets ferret hole on ^ top of steps I hope this isn't too confusing. Liana Winsauer [log in to unmask] and Neko and Totoro and Akira [Posted in FML issue 1141]