Keep your feline friend's health in check with Petkit Flushable Occult Blood Test Unscented Clumping Tofu Cat Litter. This unique litter changes colors to help pet parents monitor their kitty’s urine and detect potential illnesses early on. The test particles quickly change color within three seconds when exposed to colorless traces of blood in your furbaby’s urine, and the color remains for up to seven days to serve as a reminder of your four-legged family member’s health. Plus, this is a quality litter that forms tight clumps, and it is flushable. And, you’ll like that the activated carbon and deodorant particles combat odors.