Hi, my 21 month son was on enfamil from 6 weeks old until 16 months. It was fantastic for him as he was constantly bringing up all of his feeds before. He was still sick until he was 1 year but it was certainly much less and he was a great weight at all of his weigh ins. The only downfall to taking this milk is that i found it really difficult to wean my son off the enfamil and onto cows milk. He still refuses cows milk so he is not on any milk at all, just plenty of yogurts for his calcium. Obviously not all babies are the same and you may have no problems switching to cows milk in the future. In my opinion it is definately worth switching.
