Canadian Brand. Intersand OdourLock MaxCare Litter is produced from high-quality clay, 100% pure and natural, for maximum efficiency without compromise! Included with this litter is a bag of patented granules that will help monitor your cat's health, checking for blood or glucose in their urine and helping let you know if your cat should be taken to the vet. This litter will block ammonia (OdourLock technology activates on contact with urine to neutralize odours), has no tracking, and is extra-hard clumping. It is also dust free and safe to use, ideal for owners of cat with asthma or dust allergies.