Okay guys this may sound like a dumb question.. how do you know the difference between a baby who is normal and who is gassy? We changed from simlac advance to sensitive to total comfort and now allimentum for the past month and a half. I swear it seems like I use a whole thing of gas drops in about a week and a half. She has a bowel movement about every 3 days and is on probiotics. Her belly gets hard often but her bm are mushy consistently. She's fussy a lot. Has trouble burping and spits up a couple times a day.