My son has CMPA and has been on Nutramigen for 14 weeks, worked a treat. We have just been to Spain and the last few days of the holiday and 1 week since being back his poos have returned to watery and green (his biggest symptom before diagnosis). I know Nutramigen is just extensively hydrolysed so does still contain the protein in, but is it a possibility it could have stopped working after this long?! Or could it be a because I used bottled water in Spain? I am going to contact GP tomorrow but just wondered if anybody has any advice or experienced anything similar.