sometimes i am not producing enough milk for my daughter so i have no choice but to supplement with formula. i am a vegan so i want to avoid regular formula if possible. i have been trying Enfamil's soy formula for sensitive tummies but every time i give it to her she throws up. I have tried diluting it with water and i have tried pacing her so she doesn't drink it too fast and it still isn't working. any suggestions on a soy formula to try or another way to go about it??