Racing is another example of human abuse of animals merely for entertainment and pleasure, regardless of the needs or condition of the animals. For horses, especially, the track itself poses dangers - falls and fractures are common in both flat and jump races. Often, lame horses are doped to allow them to continue to race, with the risk of serious injury. And at the end of it all, if the animal is not a success, or does not perform as brilliantly as hoped, it is disposed of. While some of the top dogs and horses may be kept in good conditions, for the majority of animals this is not the case. Tens of thousands of dogs are disposed of every year by the British greyhound racing industry - because they fail to make the grade as racers or when their racing days are over.