Small dogs with long snouts, such as the whippet greyhound and the toy dachshund, live longer than large, flat-faced breeds. Researchers analyzed data collected on more than half a million dogs across the United Kingdom.

It's the first study to examine variations in life expectancy based on such a wide range of factors, including race, height, facial shape and gender. The dogs with the longest life expectancy are Lancashire Heeler (15.4 years) followed by Tibetan Spaniels ( 15.2 years) and Miniature DachshUNs (14 years)