Get a kitty litter that keeps your home smelling fresh while helping you monitor your cats' health and wellness with Purina Tidy Cats Tidy Care Alert Cat Health Monitoring Cat Litter with Silica Crystals. A silica crystal litter from Purina, a brand you trust, Tidy Care Alert unscented cat litter is made with safe ingredients and features pH detection technology that changes colors to help monitor cat health. Compare the color of the cat litter crystals with the color guide within 2 hours of your cat using the litter box. This low dust and lightweight multi cat litter for easy maintenance with no clumps to remove thanks to its highly absorbent non clumping cat litter crystals. Plus, the long-lasting cat litter odor control will keep your home smelling fresh. Feel confident knowing that you are choosing a truly smart cat litter. (Note: This litter is not a test to diagnose, cure, prevent, treat or mitigate disease. Discuss color changes with your veterinarian.)