The more cats you have, the more you need the extra-strength odor elimination of ARM & HAMMER Multi-Cat Strength Clumping Litter with Ammonia Odor Block formula. It combines powerful baking soda crystals with ammonia odor neutralizers to eliminate the toughest odors on contact, no matter how many cats you have. Plus a fresh scent is released every time your cat uses the box. Provides rock-solid clumping for easy removal; 99% dust free and low-tracking.