While all Naturally Fresh's walnut shell formulas spark a cat's wiring to bury their business in nature, this non-clumping pellet litter isn't just for cat kids. It's ideal for all small animals, such as gerbils, rabbits, ferrets, and puppies. Naturally Fresh Pellet Litter is made with a proprietary blend of the fibrous materials found only in walnut shells. This litter provides superior odor control, absorbs three times better than clay litter, and is virtually dust-free. Naturally Fresh non-clumping pellet formula controls up to 7x more odor than other leading non-clumping litters.