My girls are almost a month old and were born at 35 weeks. They spent 10 days in SCBU and i specifically said that i wanted them to have Aptamil. They only had SMA or cow and gate. So i took in lots of my own but on their own accord they put my girls on SMA. They were born 4lbs 5 and 4lbs 6 and now weigh a brilliant 6lbs however they take 3.5oz or just under every feed and where as they keep it down they sometimes look uncomfortable. (Not wind) as i spend lots of time making sure they are winded and sometimes they even wind themselves but i've noticed they hold their tummies in sometimes and wince and sometimes constipated. I spent 3 hours with my girl between 12am and 3am this morning as she was unsettled and i am contemplating going back to the Aptamil but is there a difference? I'm a first time mum and just wanna get it right!