Lack of breastfeeding support is often cited by mothers as one of the key reasons for premature weaning. The experiences and perceptions of breastfeeding mothers in a range of contexts and their support needs have been studied, but there has been little exploration of the specific breastfeeding topics that women are investigating via social networking sites (SNSs) such as Facebook, and how breastfeeding peer supporters respond to queries about breastfeeding concerns on a SNS.