<P> Fat - Soluble Vitamins </P> <P> Vitamin A is required in kitten diets because cats cannot convert carotenes to retinol in the intestinal mucosa because they lack the enzyme so this vitamin must be supplement in the diet . Vitamin E is another required vitamin in kitten diets seeing as deficiency leads to steatitis, causing the depot fat to become firm and yellow - orange in colour, which is painful and leads to death . Also, Vitamin D is an essential vitamin because cats cannot convert it from precursors in the skin . </P> <P> Water - Soluble Vitamins </P> <P> Cats can synthesize niacin, but their breakdown exceeds the rate that it can be synthesized and thus, have a higher need for it, which can be fulfilled through an animal - based diet . Pyridoxine (vitamin B6) is required in increased amounts seeing as it is needed to produce amino acids . To continue, vitamin B12 is an AAFCO recommended vitamin essential in the metabolism of carbohydrates and protein and maintains a healthy nervous system, healthy mucous membranes, healthy muscle and heart function and in general, promotes normal growth and development . Choline is also a AAFCO recommended ingredient for kittens, which is important for neurotransmission in the brain and as a component of membrane phospholipids . Biotin is another AAFCO recommended vitamin to support thyroid and adrenal glands and the reproductive and nervous systems . Kittens also require riboflavin (vitamin B2) for heart health, pantothenic acid (vitamin B5), and folacin . </P>

When do kittens open their eyes and walk