FF moms! I switched from Enfamil Prosobee which is a soy based formula to Enfamil Gentlease which is milk based. Both formulas were recommended for babies with gas and sensitive stomachs. around week 9 which is when I switched from the soy to the milk formula my LO gained a visually significant amount of weight. Her face is chunkier and her thighs are bigger. I am wondering if I should go back to the soy due to the rapid weight gain? Are you supposed to manage your babies weight this young?