Nan HA. Yep, only comes in a gold, but Sam didn't get constipated on it - he just didn't poo frequently, but they were always soft.

Sam was also a great chucker... but if he ever had a different formula the chucking would be even more extreme and just generally ick. We thickened it for a while and it made a small difference (more in that his puke was slower-moving and therefore easier to catch). When he got older it became evident that he had a slight dairy intolerance - the HA formula was ok, but the others were just BAD.

BW