My nearly 7 month old DS has been losing weight. He was diagnosed with reflux and put on Zantac and we're making a gradual switch to Prevacid. But he's only gained back a few ounces in the past month and they're starting to bring up adding in some formula. Does anyone have any guidance for me? How do I make this boy gain weight? He's eating like a champ, not throwing up or having diarrhea. Where is it all going???