What are some of the consequences of giving a bottle of formula now and then? (themilkmeg.com)
You might also try giving the bottle when your baby is hungry rather than at a feeding when she might be nursing as much for comfort as for nourishment. (babycenter.com)
When trying this method it is always best to start with giving the bottle with formula to another person for the first feeding. (coralspringsdoula.com)