The process by which women came to use internet-facilitated peer-to-peer shared milk was explored via a written questionnaire administered to 41 peer milk recipients from five countries. Respondents were universally unable to provide some or all of the milk their infants required. Twenty-nine dyads had a medical condition that could have affected their ability to breastfeed. Many respondents had had great difficulty in finding health workers who could assist them with their breastfeeding challenges. Before obtaining peer-shared milk, respondents had tried to increase their own milk supply, used infant formula or sought donor milk from personal contacts. Health workers dealing with breastfeeding women require greater training in the recognition and treatment of conditions that adversely affect breastfeeding including a physiological incapacity to fully breastfeed. Peer-to-peer milk recipients appear to be very satisfied with the solution milk sharing provides to their problem of being unable to fully breastfeed their infants.