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, Taiwanese Canis, Taiwanese Native Dog (台灣土狗) or Takasago Dog (高砂犬). The medium type of the Formosan Mountain Dog has a shoulder height under 50 centimetres (20 in), with a firm and fit body, slim waist, big chest and half-covered ears. The most common type of these three in recent years is the medium-sized dog. Furthermore, they found that many German Shepherds' guarding mechanism towards strangers was not quite at the desired sensitivity. In many cases, strangers will need to get close for the dog to react.