Jesse has been forumla fed since he was 9 days old. For the first 6 months he was on Heinz Nuture Gold 1 and loved it.. no problems.. though towards the end would only drink half a bottle. When we put him up to the Heinz Nuture Gold 2 he started getting really constipated.. like REALLY.. his poos were dark green and crumbly like. So i tried S26 Gold #2. He was then back to normal and was drinking the whole thing. Recently we've just put him on the normal S26 as its damn expensive! and we feel he is getting all the nutrients he needs in solids.

I think its really trial and error.. alot of babies take to one certain formula, where others dont. Id personally just try a well known brand first and see if it agrees with bubs, and if bubs likes it. If not, then try a different one. But once you found one that works, stick with it, as changing formula too much can upset their tummies.

Best of luck!