Direct answer: arrange veterinary advice, clean the area appropriately and review tray number, size, litter, cleanliness and location. Do not punish the cat.
Treat a sudden change seriously
Urinary or digestive problems can alter toileting. Straining, repeated attempts, pain or inability to pass urine can be urgent; contact a vet immediately.
Audit every tray
Check that trays are clean, accessible and distributed around the home. A large cat must be able to enter, turn and dig without being cramped.
Remove social pressure
Another cat, dog, child or noisy appliance may block access. Add genuinely separate options and let the cat use them without being watched closely.
A practical furniture note: The Dome can support this routine where its current specifications suit your cat and room. Product furniture cannot diagnose or treat a health or behaviour problem.
