A piebald is an animal, especially a horse, that has a spotting pattern of large white and black patches. The colour of the horse's skin underneath its coat is both black (under the black patches of hair) and pink (under the white patches). This alternating colour pattern is irregular and asymetrical. Other than colour, it is similar in appearance to the skewbald pattern. Some animals also exhibit colouration of the irises of the eye that match the surrounding skin (blue eyes for pink skin, brown for dark). The underlying genetic cause is related to a condition known as leucism. Piebald horses In the British Isles piebald and skewbald (brown and white) are together known as coloured. In North America, the term for all large spotted colouring is pinto, with the specialized term "paint" referring specifically to a breed of horse with American Quarter Horse or Thoroughbred bloodlines in addition to being

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