Signs Your Newborn is Hungry - as part of the expert series by GeoBeats. How do you know when your baby is hungry? Basically, babies cry and that is how they let you know they are hungry. One of the things that we can do to just sort of make parenting, from the very beginning, easier on ourselves - because it is a big adjustment - is to simply kind of pick up on the signals that your baby is giving you. Baby cries, you feed the baby. Baby cries later, you feed the baby. Not to worry. It is not the time to worry that you are doing too much of it, because one of the wonderful things about babies is that they really do not get overfed. They do not take in too much food. So, we can just feed them. And we see that when they are finished, they pull away from the nipple, they pull away from the bottle, they are done.