Who doesn’t love a cute chihuahua dog? It is one of the smallest dogs and it has many varieties including; the short haired and the long haired. The Techichi is its alleged ancestor, but the facts surrounding the chihuahua breed’s origins is unclear. It is in fact named after the state in Mexico, where it is believed to have originated. These little lovable pets are to be handled with extreme care in all facets. If overfed the chihuahua can become overweight, which shortens its 15 to 20 year life span and can get diabetes.