Objective: This study aimed to explore barriers and facilitators of the provision of dairy and PBDA by parents of preschool-aged children, a previously unexplored area of research. Design: Five focus groups of parents were conducted and audio-recorded. Verbatim transcripts were analyzed using thematic analysis. Setting: University of Guelph, in Guelph, ON Canada in 2019. Participants: Thirty-two (n=19 mothers, 13 fathers) parents of preschool-aged children. Most (59%) were university or college educated. Results: Facilitators common to both dairy and PBDA provision included perceived nutritional benefits, such as dairy’s calcium, protein and fat content, and PBDA’s protein content and the perception that PBDA adds variety to the diet. Facilitators unique to dairy vs. PBDA provision included the taste of, familiarity with, and greater variety and accessibility of dairy products, specifically child-friendly products. A facilitator unique to PBDA vs. dairy provision was ethical concerns regarding dairy farming practices. Barriers common to both dairy and PBDA provision included perceived cost, concerns regarding the environmental impact of production, and high sugar content. Barriers specific to dairy included use of antibiotics and hormones in dairy production. A barrier specific to PBDA was the use of pesticides. Conclusion: Behaviour change messages targeting parents of preschoolers can emphasize the nutrition non-equivalence of dairy and some PBDA, and can educate parents on sources of affordable, unsweetened dairy and PBDA.