Formosan Mountain Dog

The Taiwan Dog (Chinese: 台灣犬) is a breed of small or medium dog indigenous to Taiwan. These dogs are also known as the Formosan Mountain Dog.
Taiwan Dogs have been genetically traced back between 10,000 and 20,000 years ago, making them one of the oldest and most primitive dog breeds in the world.
They are well-adapted to the uneven and thickly forested terrain of Taiwan, having become a semi-wild breed prior to the arrival of several colonial reigns and foreign powers. Notwithstanding these adaptations, Formosans retained the potential to be trained and are now used as hunting dogs, guard dogs, stunt dogs, rescue dogs, or simply as companions. Formosans are classified into one medium type and two small types.