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.
Kittens can start using the litter box anytime after 4 weeks. If the mother cat uses a large box, you may want to use a slightly smaller container for the kittens. Be sure to place the kittens in the box after each meal and take the kittens' paws and rub them in the litter using a scratching motion.ittens instinctively begin to use dry loose materials at 4 weeks old! Litter training is how you redirect this natural behavior to a litter box so your kitten goes where he is supposed to! Read also about inconsistent litter box users, training feral cats and about cats that go in odd places.