Chihuahuas live an average of 12-18 years. Some Chihuahuas have been known to live longer, though many live an average of 15 years total. Their small size breed is one of the reasons .
It would seem that Chihuahuas are one of the , with their average old age higher than other dogs. Most other breeds of dogs live an average of 12 years- the Chihuahua is 15, with the oldest Chihuahua living until the age of 20!
The and lived 20 years and 265 days. With many other dog breeds living past 20 years and Chihuahuas having one of the longest lifespans of any dog, its likely this record could soon be broken!