How much should babies eat?

I've noticed, now that my son is three weeks old, his feeding habits have started to change.  He's hungry more often, and will eat more in one feeding.  For the most part I've been sticking to the basic guidelines he had in his first week.  Feeding at the breast for at least 20 minutes on each side, or eating 3-4 oz in a bottle feeding.  Where it used to be a challenge to get him to feed the entire forty minutes, or to finish that last oz in the bottle, now he will go an hour or more at the breast, and will still seem hungry after gulping down the entire 4 oz from a bottle.  This is becoming … [Read more...]