It is necessary because Oxygen demands need to be reduced. This may require more aggressive support
including the use of continuous positive airway pressure (CPAP) or mechanical
ventilation. Newborns born to drug-addicted mothers exhibit hyperirritability,
exaggerated reflexes, and transient tachypnea.
It helps make and fix body tissue.

The digestion of protein begins at mouth and it continues at stomach and small intestine.
Hope it helps:)