Hi mummypooh, actually if your baby is getting rid of the air, it is good. If the air doesn't come out, it will be painful for them. Sometimes it is the food you eat that cause gassy-ness in the baby. Foods like brocolli and cauliflower will cause more gas in baby. Ginger my pediatrician told me might caused baby to be jaundiced. So I avoided eating too much ginger. It is true though that breastfed babies are less gassy than bottle-fed babies. As long as your baby is not in pain, I think it is ok.