Greyhound racing is the sport of racing greyhounds. The dogs chase a lure (an artificial hare or rabbit) on a track until they arrive at the finish line. The one that arrives first is the winner.

In many countries, greyhound racing is purely amateur and conducted for enjoyment. In other countries (particularly the US, UK, and Australia), greyhound racing is a popular form of parimutuel gambling, similar to horse racing.

The first recorded attempt at racing greyhounds on a straight track was made beside the Welsh Harp reservoir, Hendon in 1876, but this experiment did not develop.

There is some popular concern in the latter countries regarding the well-being of the dogs; the effectiveness of industry efforts to address these concerns is controversial. A greyhound adoption movement has arisen to assist retired racing dogs in finding homes.

In the United States, greyhound racing is not governed by the Animal Welfare Act, so treatment of the dogs depends largely on the industry’s self-regulation.

In several European countries (Belgium, Denmark, Czech Republic, Finland, France, Germany, Hungary, Netherlands, Sweden, Switzerland) greyhound racing is carried out by the owners of the dogs without financial interest.

The Greyhound Racing Authorities in Australia regulates greyhound welfare and living conditions and all racing authorities in Australia finance Greyhound Adoption Groups, which house dozens of greyhounds a month.

In the UK Greyhounds are not kept at the tracks and are instead housed in the kennels of private individuals, and transported to the tracks to race. Unfortunately this can sometimes leave the dogs exposed to substandard treatment from their owners.