Missy the Mixed

In 2013, a study found that mixed breeds live on average 1.2 years longer than pure breeds

Several studies have shown that mixed-breed dogs have a health advantage over pure-bred dogs. A German study finds that "Mongrels require less veterinary treatment". Studies in Sweden have found that "Mongrel dogs are less prone to many diseases than the average purebred dog" and, referring to death rates, “Mongrels were consistently in the low risk category”. Data from Denmark also suggest that mixed breeds have higher longevity on average compared to purebreeds. A British study showed similar results but a few breeds (notably Jack Russell Terriers, Miniature Poodles and Whippets) lived longer than mixed breeds.