A sighthound is a type of dog that relies on its sense of sight to hunt and track prey. These dogs have keen eyesight, speed, and agility, which they use to chase down their quarry. Sighthounds are typically tall and slender with long legs, large nostrils, and wide-set eyes. They include breeds such as greyhounds, whippets, salukis, borzoi, and Afghan hounds, among others. These dogs were bred for hunting and have a natural instinct to chase after moving objects.