How Many Years Do Dogs Live?
Dogs live up to 10 to 15 human years. The general trend regarding life expectancy among dogs relates to their size. Small dogs tend to live longer than medium dogs that can grow older than large and giant dogs. Small dogs weighing 20 lbs. or less have an average lifespan of 14 years, medium dogs weighing 21 to 50 lbs. average at 13.5 years, large dogs weighing 50 lbs. to 90 lbs. average at 12.5 years, and giant dogs weighing more than 90 lbs. average at 10.5.
However, even within size categories, specific dog breeds differ in average lifespan. Chihuahuas, for example, live up to 14 to 18 years while Dachshunds, on average, only live up to 10 to 14 years. Blood Hounds live up to 10 to 12 years while Great Danes only live up to 7 to 10 years.
Aside from breed, a factor that could affect a dog's life expectancy is their diet. In particular, specially formulated senior diets for dogs of advanced age could improve their chances of going past their breed's average.