Greyhound racing is an organized, competitive industry in which greyhound dogs are raced around a track. There are two forms of greyhound racing, track racing (normally around an oval track) and coursing. Track racing uses an artificial lure (now based on a windsock) on a track until the greyhounds cross the finish line. As with horse racing, greyhound races often allow the public to wager on the outcome. In coursing the dogs chase a lure (originally a live rabbit that could be killed by the dog).