If your baby is hungry, your baby will show you their feeding cues: Licking their lips, sticking their tongue out, making smacking sounds, rooting (turning their head and opening their mouth), trying to suck on their hands or fingers, and crying. If your baby is full, their sucking may slow down and they may turn away from the breast or bottle. When your baby is full, they will be content; you will see a calm, relaxed, and happy baby.