5. How do I know if my baby is hungry and getting enough to eat? Breastfed babies will feed 10-12 times per day and formula fed babies 8-10. Don’t wait until they’re crying to feed them—that will actually lead to a frustrated baby (and in turn a frustrated Mommy too). During the first few days, it’s important to feed them every 2-4 hours—even if that means waking them up to do so.