pidan Health Tofu Cat Litter (4 x 2.4kg/6L bag) Occult Blood Monitoring Colour-Changing Litter, Strong Clumping, Flushable, Dust-free, Easy Scooping, BiodegradableAT HOME HEALTH CHECK Built in test granules instantly turn blue on contact with otherwise invisible trace blood, detecting hemoglobin as low as 0. 1%. The color stays visible for up to 48 hours, giving you a clear, early warning of potential urinary issues. PREMIUM PEA FIBER FORMULA pidan Tofu Litter's ultra porous sponge texture locks in liquid on contact, creating tight, quick release clumps that wont stick to the tray bottom; superior absorption