PETKIT Tofu Cat Litter, Fast Clumping, Tofu & Bentonite Mixed Cat Litter with Occultblood Test Particles, Ultra Absorbent, Odor Control and Flushable, Dust-free & Low Tracking, 4 Packs/9.6kgIngredients: 70% Tofu litter; 29% Bentonite litter ; 1% Blood test particles Safe Cat Litter for Early Health Detection: PETKIT mixed cat litter includes innovative color changing test particles that help monitor your cats urinary health at a glance. These particles react within 3 seconds to detect trace amounts of blood in urine a potential early sign of illness and retain the color change for up to 7 days. A smart way to spot potential illness