Hmm, it may be off the point. I recalled my friend who has twins years ago (now they are young adults) who did not accept formula milks. My friend had tried different formulas for her twins, but they ended up hating them. To battle her wits, she went to see doctor about this problem. What did her doctor tell her? Try 2% milk. She did try to feed twins with that regular 2% milk and they finally accepted the milk. She was very thrilled because that cost of regular 2% milk was much cheaper than formula can. I didn't remember why she could not breastfeeding her twins at that time. She has a son (I don't remember if he accepted either formula milk or regular milk).