In dogs, hematopoiesis primarily occurs in the bone marrow, where stem cells differentiate into various types of blood cells, including red blood cells, white blood cells, and platelets. This process is crucial for maintaining healthy blood levels, supporting oxygen transport, immune system function, and proper blood clotting. As dogs age, the efficiency of hematopoiesis can decline, which may lead to anemia or other blood-related disorders, impacting overall health and longevity. Research in geroscience indicates that age-related changes in hematopoiesis may contribute to the deterioration of the immune system and the increased incidence of chronic diseases. Enhancing hematopoiesis could help mitigate some of these age-related issues, potentially leading to improved health outcomes for older dogs. By understanding how this process works and what factors influence it, dog owners can make informed decisions about their pets' health and longevity strategies, particularly as new therapies emerge that may target these mechanisms.