Have you tired it chilled? My DS does much better drinking hypo formulas cold. And I'm pretty sure the Neocate is actually recommended that way. I think it helps mask the taste. The hypo formulas are much more bitter than the regular ones. The amino acid ones taste even worse. From what I understand and have experienced, it takes up to a good two weeks to get their intake back up to normal. Its rough though in the mean time )-: How are you transitioning her to it? If you switch cold turkey, its probably going to be alot more difficult for her to adjust to the taste (and her body). Did they mention anything about adding an oz a day? like if you are giving her a 4 oz bottle, you would do 3oz of her old milk, and 1 of the new formula. And every 2-3 days or so, you gradually replace another oz until she is drinking an entire bottle of the new. I've tried cold turkey and the gradual way, and it worked soooo much better! It just takes a little persistance. It ususally helps me to offer the new bottle first in the morning when they are nice and hungry and in a good mood too.