ARM & HAMMER Naturals* Mutli-Cat Clumping Litter is Specially Formulated for Mult-Cat Households. ARM & HAMMER Naturals* Multi-Cat Clumping Litter is so effective, even with multiple cats, you won't believe it's natural*. It is formulated with a prioprietary blend of natural corn fibers that combine with advanced odor neutralizers and ARM & HAMMER Baking Soda to effectively absorb urine and eliminate odors instantly on contact.