CHIHUAHUA. Graceful, alert and swift-moving with a saucy expression, Chihuahuas are highly intelligent and should not be underestimated even though small in size. The Chihuahua’s history is shrouded in mystery, but some believe he originated from the Fennec Fox, a very small animal with big eyes and ears, which could explain the tiny frame, luminous eyes and large ears on the breed today. Chihuahua’s were used in religious ceremonies and were pets to the upper class. The breed derives its name from the Mexican State of Chihuahua, where the earliest specimens of the breed were found.