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Accidents and disease are also common killers among racing greyhounds. Previously, in the United States over 20,000 retired greyhounds a year were killed; recent estimates still number in the thousands, with about 90% of National Greyhound Association-registered animals either being adopted, or returned for breeding purposes (according to the industry numbers upwards of 2000 dogs are still killed annually)^[3]. These groups began taking greyhounds from the racetracks when they could no longer compete and placing them in adoptive homes. The early groups were formed in large part out of a sense of concern about the treatment of the dogs while living on the track.

In the late 20th century several Greyhound adoption groups were formed. See main article at Greyhound racing. During the early 1920s, modern greyhound racing was introduced into the United States and introduced into United Kingdom and Ireland in 1926. Until the early twentieth century, greyhounds were principally bred and trained for coursing.

The common sense of these words is 'to shine; bright'. "gryja" 'to dawn', "gryjandi" 'morning twilight', Old Irish "grian" 'sun', Old Church Slavonic "zorja" 'morning twilight, brightness'. "gray", Old High German "gris" 'grey, old', Old Icelandic "griss" 'piglet, pig', Old Icld. Subsequent words have been derived from the indoeuropean root *g'her- 'shine, twinkle': Eng.

441-442) the English name "greyhound" does not mean "a gray dog/hound", but simply "a fair dog". According to Pokorny's Indogermanisches Woerterbuch (p. Its origin does not appear to have any common root with the modern word "grey" for colour, and indeed the greyhound is seen with a wide variety of coats. "Hund" is traced to the modern "hound", but the meaning of "grig" is undetermined, other than in reference to dogs in Old English and Norse.

The name "greyhound" is generally believed to come from the Old English grighund. It is believed that they (or at least similarly-named dogs) were introduced to England in the 5th and 6th centuries BC from Celtic mainland Europe. Historically, these sight hounds have been used primarily for hunting in the open where their keen eyesight is a distinct advantage. ^{[1] [2]}.

Analyses of DNA reported in 2004, however, suggest that the greyhound is not closely related to these breeds, but is a close relative to herding dogs. Popularly, the breed's origin is believed to be traced to ancient Egypt, where a bas-relief depicting a smooth-coated Saluki (Persian Greyhound) or Sloughi was found in a tomb built in 4000 BC. However, as greyhounds have a body fat of around 16%, compared to an average of 25% in other canines, overdoing their exercise can be detrimental to their health. An adult greyhound will stay healthy and happy with a daily walk of as little as 20 to 30 minutes.

They enjoy walking and running outside. Greyhounds can live in an urban setting but require moderate exercise on a regular basis. Most companion greyhounds are kept on a leash because their hunting background has instilled a strong desire to chase things. Most greyhounds that live as pets are adopted after they retire from racing.

They do not have undercoats and therefore are less likely to trigger people's dog allergies (greyhounds are sometimes incorrectly referred to as "hypoallergenic"). Their talents include sighting and hunting. Greyhounds are generally loyal, tractable dogs with developed intellects, although their territorial instinct is weak and they make poor guard dogs. They can get along well with children and family pets (often including cats).

Greyhounds can make good pets because of their mild and affectionate character. Greyhounds are often referred to as "Forty-five mile an hour couch potatoes.". Most are quiet, gentle animals. They are sprinters, and although they love running, do not require extensive exercise once they leave the track.

Although greyhounds are extremely fast dogs, they are not high-energy dogs. There are approximately thirty recognized color forms, of which variations of white, brindle, fawn, black, red, blue, and grey can appear uniquely or in combination. Greyhounds have very short hair, which is easy to maintain. Females tend to be smaller with shoulder heights ranging from 68 to 71 cm (27 to 28 inches) and weights from 27 to 31 kg (50 to 75 pounds).

Male dogs are usually 71 to 76 cm (28 to 30 inches) tall at the withers and weigh around 29 to 36 kg (65 to 90 pounds). . They are one of the fastest land mammals; their combination of long, powerful legs, deep chests and aerodynamic build allows them to reach speeds of up to 72 km/h (45 mph). The Greyhound is a breed of dog used for hunting and racing.

. None of these rides operate today. Greyhound was the name of several roller coasters in the United States and Canada. There is an indoor football team based in West Virginia called the Ohio Valley Greyhounds.

Marie, Ontario, Canada is called the Greyhounds. The OHL hockey team in Sault Ste. The Greyhound is the mascot of the Assumption College sports teams. The dog is bred for showing instead of racing.

The dog is not raised in a country where racing is popular. The dog does not have the required temperament. The dog has physical defects. The dog is too slow.