As newborns, babies seem to eat, sleep, and poop all day - every day. But, as your baby gets older, you may be wondering how much your baby should be eating, how often, and how many ounces by age. Keep in mind that milk should be your baby's primary form of nutrition for the first year. Even after you've begun to offer solid foods, your baby's milk intake should not decrease much, if at all. Also, babies are very good at self-moderation, so it is usually unnecessary to limit your baby's milk