Here are some cues that babies use to alert you that they need something. When you learn these, you will be better able to recognize them early and respond to baby in calm, proactive ways rather than rushing around trying to get things done under the gun.

Hunger cues:  Here is a list of early and late hunger cues:

Early cues from the earliest to the latest:

Moving hands toward the mouth.

Smacking the lips.

Rooting: this means that baby’s lips will move toward anything that touches the  face near the mouth (in anticipation of latching  on to your breast.)

Sucking on the fingers.

Fussiness.

Late  hunger cues from earliest to latest:

Fussiness.

Flailing the arms and legs around.

And lastly : Crying.