Read the Misses as Information, Not Misbehaviour
A senior cat who urinates or defecates beside the tray, in a hallway, or on a rug is rarely making a statement. More often the tray has become hard to reach in time, painful to climb into, or unpleasant to use. Arthritis can make a high-sided box feel like an obstacle, a tray in a cold basement or up a flight of stairs can be too far for a cat who wakes with urgency, and constipation or difficulty squatting can leave droppings just outside the box. Where the accident happens is a clue: beside the tray suggests entry or posture trouble, far from it suggests distance or confusion.
Lower the Barrier and Shorten the Journey
Swap to a tray with one low entry side, or cut a gentle entry into an existing box and smooth the edge, so your cat can walk in rather than climb. Keep litter at a shallow, comfortable depth and choose an unscented litter your cat already accepts, since a sudden change can add avoidance on top of difficulty. Place an extra tray on each floor your cat uses and near a favourite sleeping area, away from food and water. Put a washable mat under and around each tray to catch near misses and make clean-up calm rather than dramatic.
Rule Out a Medical Reason Promptly
New or increasing accidents in an older cat warrant a vet visit, especially alongside drinking more, passing small amounts often, crying in the tray, blood in urine, loose stool, or weight change. Take notes on frequency, location, and whether stools look hard or strained, and if you can, a photo of the tray after use can help the vet picture the problem. Clean accident spots thoroughly with an enzymatic cleaner made for pet messes so scent does not invite a repeat visit to the same rug, and never punish or rub your cat's nose in a mess, which only adds fear around toileting.
Rebuild Confidence Around the Tray
Make Clean-Up and Monitoring Part of the Day
Scoop trays at least twice daily while the problem is active, because a senior cat who already finds toileting effortful is more likely to avoid a tray that smells used. Keep a spare set of washable mats rotating through the laundry so a clean surface is always ready, and place a low night light near the tray your cat uses most after dark. Note whether accidents happen mainly overnight, after meals, or after naps, since timing can point toward urgency on waking, difficulty posturing after rest, or a route that has become too long at certain hours.
Praise calmly or offer a small treat when you see your cat use the tray successfully, and keep the area quiet, without laundry machines rumbling beside it or children crowding it. If there are several cats, make sure this senior cat is not being ambushed on the way to the tray by a younger housemate, and give a separate tray in a peaceful spot if needed. Review the setup weekly: as mobility changes, a tray position that worked last month may need moving again. Keeping the accident locations and vet findings together in KinsLe's Pet Passport means every change you try is recorded in one place, so progress and setbacks are easy to show at check-ups.