7 Things You Didn’t Know About How Long Breeds Live

When we think about how long animals live, many assume size, intelligence, or activity automatically determines lifespan. But the reality is much more complex, especially when we look at different breeds, whether dogs, cats, or other animals. Here are seven surprising facts about the lifespan of breeds you might never have heard before.

#1: Small dog breeds often live longer than large breeds

Though it seems counterintuitive, small dog breeds like Chihuahuas and Toy Poodles have significantly longer lifespans than larger breeds such as Great Danes and Mastiffs. This is partly because larger dogs undergo their growth phase more quickly, which taxes the body more.

#2: Cats with mixed genes live longer

Pedigree cats like Persians and Siamese often have genetic predispositions that can shorten their lifespan. In contrast, domestic cats, which are often mixed breeds, have fewer hereditary diseases and can therefore live longer—often up to 20 years or more.

#3: Human breeding has shortened the lifespan of certain breeds

Selective breeding has led to extreme physical characteristics in some breeds, like Bulldogs and Pugs, which unfortunately often bring health issues and shorter life spans. These breeds struggle with breathing issues and joint problems, for example.

#4: Some breeds are designed to last longer

Certain breeds—like Australian Cattle Dogs or Border Collies—are bred to be robust and energetic throughout their lives, which often results in a longer lifespan of up to 16-17 years. They are also less prone to genetic diseases.

#5: Nutrition and lifestyle matter more than breed

While the breed can give an indication, factors like diet, exercise, and healthcare greatly influence lifespan. A Golden Retriever with a healthy lifestyle can live longer than a Toy Poodle with poor habits.

#6: Hybrid breeds can be genetically stronger

Many so-called “designer dogs” like Labradoodles or Cockapoos combine genes from different breeds. This genetic variation can reduce the risk of hereditary diseases and potentially prolong their lifespan.

#7: The world’s oldest dog and cat were mixed breeds

The oldest recorded dogs and cats in the world—such as the dog “Bluey” (29 years) and the cat “Creme Puff” (38 years)—were not purebred. This emphasizes that mixed breeds can have significantly longer lifespans, often due to lower genetic vulnerability.

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