My little boy is now 1 and until now he has been on Nutramigen milk, I have started him on Full Fat Cows milk since his first birthday. Since this he has been in hospital with Bronchitus and suffered bad excema and is starting to be a bit sick, and bringing up what can only be described as lumps of sour milk!! His chest still sounds heavy as well. i have tried him back on Nutramigen and he is sick like a waterfall.... Has anyone experienced issues like this and have any advice for me..