hello, am slightly worried about my 3 month old. He is combination fed - on about 4 bottles of formula a day and the rest breast fed and seems to be going for days without pooing. He is averaging a 'movement' every 48hours and beforehand will squirm for about an hour clearly uncomfortable then when the explosion finally happens they are a dark greeny colour. Have been advised (by mother-in law) to try brown sugar water but am hesitant to try this..any suggestions...have tried baby massage and bicycle legs which doesnt seem to make much difference.