Litter trays and toileting
The best litter box for elderly cats is one that is large, giving your cat plenty of space to move around as they do their business. It should have low sides so they can easily climb in and out. Some litters may be too rough for an elderly cat, even if they were fine when they were younger. Don't make any sudden changes, but provide additional trays with 3cm of soft, fine litter that will feel more comfortable under their paws.
Always provide several litter trays in the house, even if your cat has toileted outside all their life. There will be times when an older cat needs an indoor litter tray, such as when it's raining, or if the usual toileting site is frozen, or if they feel intimidated by neighbouring cats. Place the litter trays in quiet areas of your home so your cat feels safe.
Though it’s usually best to keep litter trays away from food and water, your cat may prefer it closer, especially if they’re particularly elderly or suffering from an illness that makes them less steady on their feet. Keeping the litterbox in an accessible place will reduce accidents.
Older cats are less able to defend themselves and their territory, so they can become more anxious and more dependent on their owners. By going outside with your cat, you may help them to feel protected against neighbouring cats. If your cat still prefers to toilet outside, provide a newly dug-over border as close to the house as possible and maintain it regularly.