Overall, medium-sized dogs have a higher risk of ... usually of the same breed. Mixed breed dogs live about 1.2 years longer ...

Medium-sized dogs, including golden retrievers ... There is some evidence that suggests mixed-breed dogs live longer than purebred dogs, according to a 2019 study, but the difference in lifespan ...

[1] Mixed-breed dogs are generally considered to be healthier than purebred ones. However, recent research shows this may not be true for some popular “designer dogs”. [2] A “doodle dilemma ...