when can kitten leave nest
8 Weeks. The organization Cats International recommends keeping kittens with their fellow litter mates and mothers until about 8 weeks in age. In general, it is safe to allow kittens to separate from the mother cat at this specific age, but usually no younger than that.ittens rely on their mother's milk for proper growth and development. In many cases, kittens begin eating strictly solid foods at around 8 weeks, and then may be ready to leave their mothers for good.