How long can a newborn go without eating?

Newborns typically need to eat every 2 to 3 hours, as their stomachs are small and they digest food quickly. Generally, a healthy newborn should not go more than 4 to 6 hours without feeding, especially in the first few days of life. Extended periods without feeding can lead to dehydration and low blood sugar, so it's important to establish a regular feeding schedule. If there are concerns about a newborn's feeding, it's best to consult a pediatrician.