When “Breast Is Best!” is displayed on the walls of every maternity ward and walk-in clinic, not to mention libraries and bus shelters, it’s easy to understand why some moms might feel guilty about wanting to add bottle-feeding to the mix. But Amy Peterson, a lactation consultant and co-author of Balancing Breast and Bottle: Reaching Your Breastfeeding Goals, says combining breastfeeding with bottle-feeding—using formula, expressed milk or both—is a choice that works for many. Whether your partner is hankering to give a bottle, your return to work is imminent or you just need some time for yourself, here’s how to make combination feeding work for you.