It's a fact that dogs don’t live long enough and many variables cause this. The most common are breed and size. Larger dogs tend to age more quickly than smaller dogs because of their genetics and greater stresses on their joints—orthopedic problems are one of the primary risks, which requires weight control and exercise. The dental problems so common in small dogs can reduce lifespan, too. Fortunately, there are several ways to help your pet’s longevity.