Promoting dog walking among dog owners is consistent with One Health, which focuses on the mutual health benefits of the human-animal relationship for people and animals. In this study, we used intervention mapping (a framework to develop programs and resources for health promotion) to develop a clearer understanding of the determinants of dog walking to develop curricular and educational resources for promoting regular dog walking among dog owners. Twenty-six adult dog owners in Ontario participated in a semi-structured interview about dog walking in 2014. Thematic analysis entailing open, axial, and selective coding was conducted. Among the reasons why the participating dog owners walk their dog were the obligation to the dog, the motivation from the dog, self-efficacy, the dog's health, the owner's health, socialization, a well-behaved dog, and having a routine. The main barriers to dog walking were weather, lack of time, the dog's behavior while walking, and feeling unsafe. We compared interview results to findings in previous studies of dog walking to create a list of determinants of dog walking that we used to create a matrix of change objectives. Based on these results, we developed a print resource to promote regular dog walking among dog owners. The findings can be used by veterinary educators to inform course content that specifically educates veterinary students on the promotion of dog walking among dog owners and the benefits to both humans and animals. The study also offers veterinarians a further understanding upon which to initiate a conversation and develop educational resources for promoting regular dog walking among dog-owning clients.