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.
1 The sides of the litter box may be too high for your cat to easily get in an out. 2  If you have a smaller cat or a kitten, switch to a box with lower sides. 3  Cats may urinate outside the box if they feel the litter is too high. 4  They prefer no more than 2 inches of litter.