This cage has a grate on the bottom, which is wonderful, BUT there's no way that small animals can live in it without walking in their own poop. The pan goes on top of the grate which is the dumbest idea Ive ever heard of. Poop should fall THROUGH the grate into the pan making for a much cleaner environment for the animal. The bottom grate bars are entirely too wide for small animals to walk on without falling thru, causing anything from bad sprains in the legs and back, to even death, should the animal get stuck and no one is available to help it. The small animal cage that you also sell, is better suited to the smaller animals, the bars are much much closer together and safer all around for the animal itself. After-all, isn't that what we want? The safety of our pets.