I’ve had a lot of experience and know many others with hypoallergenic formula experiences…
The most hypoallergenic formulas as far as I know are Neocate and Ellecare. (EO28 ranks pretty hypoallergenic as well, that’s flavored and for kids ages 1-10)
Against what many doctors claim, there are definitely kids that for some odd reason tolerate one better than the other Ellecare vs. Neocate. I don’t think anyone has figured out a rhyme, reason or explanation. But take it from someone who’s been down the GI/Allergy line, it’s just a fact.
Another very interesting note: there have been cases, few and far between but it does exist, kids that cannot tolerate the Ellecare or Neocate but do better on the Alimentum (which has the pig shaila). Go figure!
Feel free to ask more questions, I’d be happy to help in any way I can.