Average lifespan: 17 years
Chihuahuas are one of the longest living breeds, and perhaps because they’re also one of the smallest. The world’s oldest Chihuahua on record is megabyte, who passed away on January 1, 2014 at the age of 20 years and 265 days.
Average lifespan: 16 years
This foxy-faced dog, nicknamed “the little dog who thinks he can,” is an active dog breed that’s interested in everything that is going on around them, which enables him a long lifespan of 16 years.