A.E.
Are you breastfeeding or bottle feeding? If you are bottle feeding, then on average, between birth and six months of age your baby will need an average of 2 to 2.5 ounces of formula per pound per day. That means if your baby weighs ten pounds, he will need 20 to 25 ounces per day. Typically, babies who are one to two months will take about 3 to 4 ounces per feeding and from two to six months about 4 to 6 ounces per feeding. This varies greatly from baby to baby but these are averages that should give you an idea.
If you are concerned that your baby is not getting enough food, the main things to look for, whether breast of bottle feeding are: slower-than-normal weight gain, not making enough wet diapers, a loose, wrinkly appearance to baby's skin, and/or persistent crying. If you are concerned that your baby is being fed to much at a each feeding, look for: a lot of spitting up or profuse vomiting immediately after the feeding, colicky abdominal pain (baby draws his legs up onto a tense abdomen) immediately after feeding and/or excessive weight gain.
Regarding the bubbles, both of my children have done that around that age. In both cases, I asked the pediatrician about it and they said it was perfectly normal, although he did not explain what it was.
In all cases, if you are concerned about feedings, bubbles, etc. always consult your pediatrician when you have concerns.
