http://www.meadjohnson.com/professional/products/phenylfree2.html
Actually, it's protein (22%), fat (19%), and carbohydrates, (59%), with some vitamins and minerals thrown in the mix. And oddly, they give the source of the fat (soy oil) and of the carbohydrates (sugar, corn syrup solids, and modified corn starch), but not a peep about the source of the protein. I'd be really surprised if it doesn't include animal sources. Virtually all protein supplements do, except those marketed specifically as vegan products, and I don't think any of those contain all the amino acids listed in the Phenyl-Free. I don't think your daughters are vegans after all -- you could e-mail Mead Johnson to confirm.