Have you talked to your pedi. about possible reflux? Does he have any other symptoms (i.e. coughing, gagging, wet burps, spitting up frequently) ? Your pedi. might suggest trying a different formula. My dd was diagnosed at 2wks. with reflux and a possible milk, soy protein intolerance (MSPI). Good Start was one of the many formulas we tried and she vomited on it and ended up in the ER. She is now on Nutramigen and Prevacid and is doing great at 14 wks. Hope you find some answers soon.