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.
Cats have a natural instinct to eliminate in sand or soil, and kittens also learn from observing their mother. Kittens usually start learning to use the litter box at 3 or 4 weeks of age, so by the time you bring your kitten home, she will likely be used to using a litter box.You will not need to train your kitten to use the litter box in the same way that you would housebreak a puppy.However, it is important to make sure your kitten knows the location of the litter box in her new surroundings. Make sure the box is not in a noisy or hard-to-reach place.f you have more than one cat, make sure that the litter box is not in a location where one cat can 'corner' another as she leaves the litter box (for example in a hallway that ends in a dead-end). There should always be an entrance and an escape route.