Essential fatty acids (like omega 3 and omega 6 fatty acids) and fat soluble vitamins (Vitamin A, Vitamin E, Vitamin, D, Vitamin K). The plain fat is a nutrient too.
Kittens, generally, can begin to use a litter box at about four weeks of age, and a kitten being raised without its mother or adult cat will take slightly longer to litter train; so, keep this in mind when you begin the task of litter training your kitten. - Place the kitten in the box 1/2 hour after play or meals.
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.