Sometimes litter box maintenance can be a challenge, especially if you have more than one feline friend. World's Best Cat Litter Multiple Cat Clumping Formula is a natural whole corn cat litter made just for the litter boxes of multi-cat houses. Naturally scented, with no masking perfumes or oils, World's Best Cat Litter Multiple Cat Clumping Formula traps the strong ammonia urine odor. The intense clumping action then absorbs moisture, leaving the rest of the unclumped litter dry to the touch.