Have just switched to Hipp Organic first milk, because 6 month old dd2 has started to have really runny poo, and horrendous stinky wind, that seemed to cause her quite a lot of pain. I wanted to try her with a formula without prebiotics to see if that was why. So moved from Aptamil to Hipp.Now she has really bad constipation, her poo is like pale clay, and it takes her a whole day to get one poo out, and it is causing her quite a lot of discomfort. I have only been using the Hipp for a couple of days, so am not sure whether to give it a bit longer (my dh thinks we should) or whether to go back to the stinky wind. Has anyone got any ideas?