A cat yowling at a closed bedroom door at two in the morning is not a mystery to be solved by willpower, and it is not a sign that you have failed him. It is a boundary, a need, and a routine that has learned to pay off. This book takes the 2 a.m. moment seriously — the pawing, the pause, the decision about whether to open the door — and shows why both choices teach the cat something. Rather than promising silence or a fixed timeline, it walks through a practical method: work out what is actually on the other side of the door that matters, whether that is territory, scent, another animal, a person, or a routine, and then build a substitute that meets the need without opening the door every time. Along the way it covers how to tell a demand from distress, why giving in sometimes makes the noise more persistent rather than less, and what to do on the nights when you have nothing left to run a plan with. It assumes no garden, no spare room, and no budget for gadgets. It does not diagnose, does not promise a fix, and does not put a clock on one. A sudden change in behaviour, litter tray problems, hiding, or a cat who has stopped eating means a vet visit first, because pain and illness present as behaviour in cats. Biting, aggression between cats, and anything involving a child belong with a vet and a qualified, force-free behaviourist. Punishment is never the answer here, and no one is shamed for opening the door at 3 a.m.