While similar in appearance to Saluki or Sloughi, DNA sequencing indicates that the greyhound is more closely related to herding dogs. This suggests that Greyhounds are either progenitors to or descendants of herding types. Historical literature by Arrian on the vertragus, the first recorded sighthound in Europe and possible antecedent of the Greyhound, suggested that its origin lies with the Celts from Eastern Europe or Eurasia. Historically, these sighthounds were used primarily for hunting in the open where their pursuit speed and keen eyesight were essential. . Males are usually 71 to 76 centimetres (28 to 30 in) tall at the withers, and weigh on average 27 to 40 kilograms (60 to 88 lb). Females tend to be smaller, with shoulder heights ranging from 66 to 71 centimetres (26 to 28 in) and weights from 25 to 34 kilograms (55 to 75 lb), although weights can be above and below these average weights.
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