Most of us have heard one dog year is equal to seven human years. This bogus fact is usually worked out so that a dog life is equal to a human life in total years, but the numbers do not add up. The average human life expectancy is 78, while the average dog life expectancy in dog years would equal around 90 years.
Furthermore, different dog breeds have dramatically different life
expectancies, ranging from a short 6 years to 13 or more years. In
general, the smaller the dog, the longer its life expectancy. Well,
I'll be doggoned.