The Chihuahua is a tiny dog with a big attitude. These playful and social little pups are often referred to as “purse dogs” and make perfect companions for city dwellers or apartment-dwellers who do not have the space or time for a larger breed of dog. If you’re thinking about adding a Chihuahua to your family, below are some facts about size, growth rate and life expectancy to help you make an informed decision on whether this breed is right for you.