* Shih Tzus have an average lifespan of 10-16 years.
* Maltese have an average lifespan of 12-15 years.
* Havanese have an average lifespan of 12-15 years.
* Chihuahuas have an average lifespan of 15-20 years.
* Dachshunds have an average lifespan of 12-16 years.
* Beagles have an average lifespan of 12-15 years.
* French Bulldogs have an average lifespan of 10-12 years.
* Boston Terriers have an average lifespan of 13-15 years.
* American Cocker Spaniels have an average lifespan of 12-15 years.