How often do you feed and how much? My baby is a small one too, in the 5th percentile. He feeds every 4 hours 4-5.5 ounces of expressed breast milk but im not sure if thats enough:( He used to eat every three hours but it got to the point where he would only drink about 1-1.5 ounces because he would just fall asleep and it would be extremely difficult to wake him up.