Bub is 5wks old, part formula, part breast fed (he is a big boy, unable to keep up with supply). The CHN put me on S26 Gold, I don't know why as I eventually read can cause constipation. So I changed to normal S26 and I can see no difference (it has been 5 days, should I see a difference by now if it was going to work?) My question is what have other mums found good for constipation prone babies? I imagine trial and error, it seems Nan or Karicare?