Although a cat’s natural instincts naturally lead them to go to the toilet outside, they can easily adapt to use a litter tray, especially if taught from a young age. Older cats may also find a litter tray useful, even if they haven’t used one before, as their joints start to get stiff and they don’t have the same energy to get outside. There are several stages to follow to help your cat learn how to use a litter tray.