Healthspan is an important concept in the field of geroscience, which studies the biological processes of aging. For dogs, healthspan focuses on the duration of life spent in good health, as opposed to simply measuring lifespan, which counts the total number of years lived. A dog that reaches an advanced age but suffers from multiple health issues, such as arthritis, heart disease, or cognitive decline, has a shorter healthspan compared to a dog that lives the same number of years while remaining active and vibrant. Understanding healthspan helps owners prioritize interventions that promote better aging in their pets. Enhancing a dog's healthspan often involves a combination of good nutrition, regular exercise, mental stimulation, and veterinary care. Innovations in veterinary geroscience, including investigational compounds inspired by research on aging, may also play a role in extending the healthspan of our canine companions. As owners, being informed about healthspan allows us to make choices that support our dogs' well-being, promoting not just a longer life, but a healthier one, characterized by vitality and joy even in their senior years.