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.
The queen is stimulating the kittens to urinate and defecate for the first several weeks of life. Around four weeks of age, they will begin sand-scratching behavior. Initially, they follow the queen to the litter box and play in it. Gradually, by about six weeks of age, they learn to eliminate in the litter box.ome kittens will take a day to open the eyes while others will take 3-4 days. The retina matures around 5 weeks of age and the kitten sees clearly. The eyes will have a bluish color to them at first and then change to their adult color over time.