It is always a good idea to have a litter tray indoors even if you cat does his business outside. This will ensure that in case of an emergency your cat won’t feel bad about relieving himself or herself indoors. There’s nothing worse than finding the corner of a room in your house soaking wet or worse.
In bad weather your cat or kitten may well prefer to stay indoors even if he or she has a cat flap. And sometimes, there might be a stray cat or other animal in the area who is bullying your cat. This can be very upsetting and he or she might not feel safe going to the toilet outside.
If your cat is sick or injured he might not want to go outside at all – and an older cat just might not feel up to it. If you provide a litter tray you are giving your cat an option and security in knowing it is safe to do their business indoors.