Senior absorbs urine and odor on contact and traps it inside the crystals to keep a cat’s genital area clean to help prevent kidney failure and urinary tract infections. The small particle size and dust fines also coat and dehydrate cat feces to reduce odor. Dr. Elsey’s senior is cleaner because it contains no organic material such as wheat, pine, corn, paper or cedar. This litter is an amorphous silica gel infused with hydrolyzed herbs to draw cats to the litter box. Each box contains a free litter box solutions booklet to help cat owners solve their litter box problems.