Formula! Ugh, he started out on similac pro advance, and he did really good. No fussing, no issues, a calm happy baby. Unfortunately with me out of work we had to apply for wic and they switched him to gerber gentle. It didn’t work for him, it started out with uncontrollable crying back arching, gagging, he burps well and gas drops weren’t helping. So the doctor put him on alimentum, well he was spitting that up horribly so bad it was coming out of his nose. Now I went and bought similac pro sen...