Particular for the cat's metabolism is The shortcoming to transform carotenoids to vitamin A; inability to synthesise ample vitamin D; incapacity to synthesise niacin from tryptophan, inability to synthesise cysteine, citrulline, and methionine; and an intolerance to glutamic acid.[15] [90] Linoleic acid can not be converted by cats and higher https://www.petskyonline.com/bird-supplies/