similac advance was given to me in the hospital because i decided to breast and bottle feed my newborn however we used the early shield formula along with breast feeding and it was fine. Now that the sample ran out i went out and purchase similac advance. The thing is I'm still breast feeding and for 2days my 3wk old baby has not have a bowel movement. I was getting 2-5 bowel movements per day so now i am very concerned. My first child was exclusively breast fed so we didnt have these issues she's 6yrs old now and we never experienced gas,fussiness or constipation and...review »