One of the most commonly encountered clinical conditions in veterinary small animal practice is osteoarthritis. Because this condition occurs secondary to an underlying musculoskeletal abnormality that results in pain, inflammation, and reduced mobility, it has a significant impact on veterinary practice and dog owners. The purposes of this interactive book is to serve as a foundation for veterinary students and dog owners to understand the pathogenesis of osteoarthritis, which joints tend to be affected in different breeds of dogs, how the condition currently is treated, and potential new therapeutic approaches.