While all of Naturally Fresh's walnut shell formulas spark a cat's wiring to bury their business in nature, their non-clumping pellet litter isn't just for cat kids. This formula is 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 (7x more than other leading non-clumping litters), absorbs three times better than clay litter, and is virtually dust-free.