J.S.
Our son is now 2 1/2, and we went through 7 (that's right...7) different formulas because he was spitting up so much! His brother, who is 16 now, did just fine with Good Start, but had violent vomiting with both Enfamil and ProSobee. Don't give up...but if you want to stay with the Gentlease, do try mixing it with the Nutramigen a little at a time. If your son is having other symptoms like taking "power naps" and not sleeping through the night, he might have an autism spectrum disorder (ASD). Our son is not autistic, but he is in the spectrum, so I am doing a lot of research on it right now, and talking to other moms who are going through the same thing. Please let us know how your son is doing! My email is ____@____.com, if you want to talk some more. GOOD LUCK!!