In dogs, melanoma is often found in the oral cavity or on the skin, where it can present as a darkly pigmented growth. While not all melanomas are malignant, the ones that are can be aggressive and have the potential to metastasize, spreading to other parts of the body. The breed, age, and location of the melanoma can influence the prognosis, making early detection and intervention critical. Some breeds, such as the Scottish Terrier and the Labrador Retriever, may be more predisposed to developing these tumors, highlighting the importance of regular veterinary check-ups. The relationship between aging and the development of cancers like melanoma underscores the significance of geroscience in canine health. As dogs age, their cellular processes can become less efficient, which may increase the likelihood of mutations leading to cancer. Research into longevity and geroscience compounds is exploring ways to enhance overall health and vitality, potentially reducing the incidence of conditions like melanoma. By focusing on longevity and healthspan, we hope to provide dogs with longer, healthier lives, which may also lower the risk of serious diseases as they age.