In 2013, a study found that mixed breeds live on average 1.2 years longer than pure breeds, and that increasing body-weight was negatively correlated with longevity (i.e. the heavier the dog the shorter its lifespan).
Mutts, dogs that have several breed characteristics, live how much longer than purebred dogs? Do bigger dogs typically have longer or shorter lives? When was a study done that discovered mixed breeds tend to live longer than pure breeds? Typically, how much longer do mixed breeds live?