Dr. Elsey's Precious Cat Senior Cat Litter addresses the medical and urinary tract problems that this specific group of cats experiences. Dr. Elsey's Precious Cat Senior Cat Litter has a small particle size that cats prefer. Dr. Elsey's Precious Cat Senior Litter also absorbs urine on contact and traps it inside the crystal to prevent bacterial growth. Dr. Elsy's Precious Cat Senior Litter has no organic material such as wheat, pine, corn and paper.