Cats are notoriously good at hiding illnesses but with the Cat Litter Company Cat Health Indicator, it detects anomalies in urine and will alert you days before your cat shows more obvious signs of being unwell. Through monitoring of your cat by using this indicator, it will provide an early detection of potential health problems including cystitis, bladder stones, urethral plugs and bladder infections, allowing a quicker diagnosis and therefore, quicker treatment. This product works well with all cat litters. Do note that the Cat Litter Company Cat Health Indicator is NOT for “at home diagnosis” and should NEVER be used as a substitute for veterinary care. If you feel that your cat is having health or urinary problems but the litter does not change color, contact and visit your veterinarian as soon as possible.