The Maya Cat Litter Box range is suitable for cats and kittens of all ages, although elderly cats with less mobility may find the Maya Enclosed Cat Litter Box easier to use. The Litter Boxes are all suitable for cats weighing up to 6kg. We recommend that the Litter Boxes are suitable for cats weighing up to 6kg because larger cats may find them uncomfortable to use. If you’re concerned that the entry hole in the door is too small for your cat, you could remove the door and use without, however, note the liner could slip out and odour control will not be as efficient.