Cats are very clean and most use a litter tray or bury their waste in the garden.
To reduce the chances of problems make sure there is one litter tray per cat and an extra one if possible. Cats like a little privacy, so make sure their litter tray is located in a quiet area. Like us, cats like a clean toilet, so make sure it's cleaned regularly. CATSAN® is an excellent clumping cat litter that reduces odour and is very easy to clean.Avoid punishing your cat after it makes a mistake, as this can be counter productive to the toilet training process. Instead, check that their litter tray is clean. A soiled litter tray could be the reason for the lapse in cleanliness. If there is an ongoing problem, contact your local vet clinic for advice.