The American Academy of Pediatrics recommends exclusive breastfeeding for the first six months. This study examined barriers to a new mother's decision to breastfeed. TS completed prenatal classes and intended to breastfeed until her baby was at least 12-18 months of age. She began breastfeeding her healthy infant shortly after birth. At two weeks, breastfeeding was going "pretty well." At four weeks, the baby experienced "tummy troubles," was diagnosed with lactose intolerance and placed exclusively on formula. This diagnosis may have been un-necessary. An examination of events showed the need for health care providers to partner with the mother, listen to her concerns, and consider other diagnostic options to support her decision to breastfeed as fully as possible.