We have 2 cats and their litter box is on the floor of the laundry room. Biscuit discovered it and got some poop out and ate it. Nasty! So we tried putting the litter box up on a short table but someone (not sure if it was the cats or puppy) flipped it over and made a huge mess. Does anyone know how to keep the dog out but let the cats in to the litter box??????