It WILL take bubs gut at least 1 week to get used to the 'change over' in formular...
We started off on NAN which caused BAD constipation for Jack...moved onto SOY which he tolerated for a while then went back to constipation issues...soo we moved onto goats formular...(which is alot easier on bubs small delicate guts) and found Jack was soo much calmer (a different bub!!) he has since been changed back to Karicare normal formular (my choice as he is older and not getting as much constipation probs as he is eating now)