Kittens will be instinctively drawn to litter or dirt in which to eliminate as early as 4 to 6 weeks of age. As a result, housebreaking a kitten usually involves minimal effort on an owner’s part.
Allowing access of your new kitten to its litterbox after eating, playing, waking up, or just before bedtime will help encourage repeat use. If your cat doesn’t seem to catch on, there might be some reason for its reluctance to use the litterbox. If so, it is your job to find out why.