A general rule of thumb for deciding how many litter boxes you should put in your home for your feline friends is one box per cat, plus one extra. For example, if you have one cat, two litter boxes are recommended. Four cats will feel more comfortable with five litter boxes. Some cats experience stress when sharing litter boxes with other cats. If you have multiple cats, one of the cats may be dominant and more aggressive to the others, claiming dominion over a litter box. Multiple litter boxes may also make your cats more likely to use them instead of going to the bathroom on your carpets and floors. Cats like having clean spots to take care of their business. Giving them more options might be more agreeable for you and them.