The Best Average Life Expectancy Long Haired Chihuahua References. Not necessarily, but this is a good rule of thumb to follow. 15.5 years is a few years longer than the life span of domesticated canines in general, which is 12.8 years.

©natalia fedosova/shutterstock.com the average chihuahua life cycle curious about what the average life cycle is like for your pet chihuahua? Web chihuahuas typically live pretty long lives; Factors that impact a chihuahua’s lifespan: