Don't jiggle or otherwise distract an infant from the feeding process. Make sure her neck is straight and she can look into your face. Burp the infant to relieve swallowed air after each 1-2 ounces and when the infant stops nursing. Gently remove the infant from the breast or bottle. Place the infant on your shoulder and pat his back gently.
Breast milk is preferable to formula for several reasons.
It has the right proportion and kinds of nutrients for babies. Breast milk, always germ-free and fresh, is easily and rapidly digested by the infant's immature system. Also, babies who are breast-fed have fewer colds and ear infections. A breast-fed infant is less likely to be overfed. The supply of breast milk from a nursing mother is dependent on the infant's needs, not on adult guesses.