Do mix breeds live longer I have a shepherd chow who is 15 and wonder if her lifespan will be than pure bred dog?

Mixed breed dogs often live longer than purebred dogs due to hybrid vigor, also known as heterosis. This phenomenon occurs when offspring inherit different genetic traits from each parent, resulting in a more diverse and resilient gene pool. This can lead to several health benefits, including:

* Increased resistance to diseases and infections

* Reduced risk of inherited disorders

* Enhanced overall health and vitality

* Longevity: As a result of these factors, mixed breed dogs generally have a longer lifespan compared to purebred dogs.

That said, it's worth noting that lifespan and health vary not only by breed but also by individual lifestyle, care, and environmental factors. A well-cared-for mixed breed dog with a healthy diet, regular exercise, and preventive veterinary care can enjoy a long and healthy life. Ultimately, age expectations should be viewed as guidelines, as each dog is unique.