tortoise
Wild Hare
Not to split a hair... but there are soy-based formulas available by prescription. Probably crazy-expensive.bibliophile birds said:long story short, there is NO SUCH THING as a commercial infant formula that doesn't contain soy. none. not even the good organic ones are soy free. the ONLY way to get soy free formula for your baby without breastfeeding is to make your own. and since there is a concern about allergies with animal milks, you have to make it with crazy ingredients.
edited to clarify