I don't have a lot of time (time for bed for Ilana), but I've had 2 kids now on elemental formula. Evan reacted to vanilla Elecare and Ilana reacted to plain Elecare (after 8 mos using it) and is on Neocate Jr now. Another thing to consider is the concentration. Evan couldn't handle 30cal/oz till he was 22-23#. Before that he'd puke before he even finished his bottle. I know a few kids that can't even handle 20cal/oz and need to have 15 or so instead. Not normal, but absolutely needed for those kids. Something to think about and possibly why the rice milk went well, it's not as calorie dense. AJ was almost 25# at 1 when we learned about his problems and he went to rice milk, he was dairy, soy, and egg free and thrived on rice milk and his diet. Evan is only 27# now at 3.5yo so would've done quite the opposite had we moved him to rice milk at 1, especially since all he could have at 1 (after I weaned) was Neocate and white rice. He was on that till 15 mos and did super. I made the decision to wean b/c I was down to 4 foods and it was just one more thing in his diet that could bother him. He did SOOOO well on the formula and rice only and was on the formula till he turned 2, but I wish I would've kept him on it since he's gained a whopping 2.5# in the last 19 mos.