Quick answer
To use Tofu Health Cat Litter with FOBT test particles, fill the litter box as usual, then watch for blue discoloration in the litter after your cat urinates — that indicates hidden blood in the urine.
Why monitor for occult blood?
Urinary tract issues in cats can develop silently. Occult blood — blood invisible to the naked eye — is often one of the earliest signs of problems like infections, crystals, or kidney disease. The FOBT (fecal occult blood test) particles in this litter give you a visual warning when hemoglobin levels reach as low as 0.1%, allowing early intervention.
What the color change means
When the test particles contact trace blood, they turn blue. This color lasts for 48 hours, giving you a clear window to notice and act. A blue patch does not mean your cat is bleeding heavily — it simply means the test detected hemoglobin at a very low threshold. Always follow up with a veterinarian for a proper diagnosis.
How to use Tofu Health Cat Litter with FOBT test particles
- Fill the litter box: Pour a 2–3 inch layer of the litter into a clean, dry litter box. Use the same depth you normally would for clumping litter. The test particles are already mixed in, so no extra preparation is needed. Make sure the litter is fresh — old or damp litter can reduce test accuracy.
- Observe after each urination: Check the litter within a few hours after your cat urinates. Look for any blue or bluish-green patches in the clumps or around the urine area. The color is most visible against the light-colored tofu base. If you see blue, note the date and time — the color will remain for 48 hours, so you can confirm later if needed.
- Interpret and act on results: A blue patch means the test detected blood. Do not panic — it does not indicate severity. Contact your veterinarian and share what you observed. If no blue appears over a week of normal use, your cat's urine is likely free of occult blood at detectable levels. A negative result is not a guarantee of perfect health — continue routine vet check-ups.
Product facts
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Tofu Health Cat Litter with Occult Blood (FOBT) Test Particles: The occult blood test particles turn blue upon exposure to colorless trace blood, detecting hemoglobin at concentrations as low as 0.1%. The color change lasts for 48 hours. This lets you spot hidden urinary health issues days or weeks before visible symptoms appear, giving you time to seek veterinary care.
Tofu Health Cat Litter with Occult Blood (FOBT) Test Particles
