Reactive oxygen species are byproducts of normal cellular metabolism and are formed when oxygen is partially reduced. While they play a role in various biological processes, including signaling pathways, an excess of ROS can lead to oxidative stress, which damages cells, proteins, and DNA. In dogs, this oxidative damage is associated with the aging process and the development of age-related diseases, such as arthritis, cancer, and cognitive decline. Understanding the balance between ROS production and the body's antioxidant defenses is crucial for promoting longevity in canine health. As dogs age, their ability to manage oxidative stress may diminish, making them more susceptible to the harmful effects of ROS. This is where the study of geroscience becomes particularly relevant. Research into compounds that can modulate oxidative stress, such as those inspired by rapamycin and senolytic therapies, may offer new avenues for enhancing the healthspan of our furry companions. By targeting the underlying mechanisms of aging, these interventions aim to improve not only the lifespan but also the quality of life for dogs, potentially minimizing the impact of age-related diseases.