I used Gerber Good Start Gentle since our pediatrician and our daycare provider recommended it. I just did half formula, half breastmilk. Then we switched to just formula.

Wic in my area gives Gerber brand and we used Gerber soothe for sensitive stomachs. My one month old gets 3oz once a day in the evening. She wouldd eat more but when I've let her she just gets fussy and spits it back up