#10 Chi’s live longer than many other dog breeds
With an average lifespan of 14 to 18 years, the Chihuahua is one of the dog breeds with the longest life expectancy. The oldest Chihuahua was 20 years, 265 days old and was called "Megabyte".
#11 One of the first registered dog breeds in the AKC
In 1884, when the American Kennel Club (AKC) was founded, the breed first appeared under the term "Chihuahua Terrier" in a list of unrecognized breeds. Only 20 years later - in 1904 - the first Chihuahua was registered. This makes the small four-legged friends one of the dog breeds that the AKC has kept for the longest time.
#12 The Chihuahua has the largest canine brain
When considering brain size in relation to body weight, the smallest pedigree dog in the world has the largest brain in the canine world.