You have cleaned the tray. You have watched your cat sniff the rim, turn, and walk away. The problem was never cleanliness. In this practical, unhurried guide, Rufus Talbert shows how to examine the tray itself and the route to it in a deliberate order: location, the path the cat must take, litter type, litter depth, box size and shape, the number and distribution of trays, and the cleaning products that leave a scent behind. Each chapter isolates one variable and offers a single change to test, so that you can learn what your cat is actually rejecting instead of repeatedly cleaning a tray he was never going to use. The book is clear about its limits: it does not diagnose, it does not promise a timescale, and it says plainly that a sudden change in behaviour, especially litter tray problems, hiding, or a cat who has stopped eating, is a reason to see a vet first. Biting, aggression between cats, and anything involving a child should be routed to a vet and a qualified, force-free behaviourist. There is no punishment here, and no blame. Just a method for standing beside the tray and finally understanding what your cat is telling you.