Mike Ehrmann/WireImage/Getty Images

Barbaro wins the 2006 Kentucky Derby, seen here. Two weeks later however, the Preakness Stakes proved to be his final race. A broken leg would be the end of his career and eventually his life.Mike Ehrmann/WireImage/Getty Images

A horse racing track near San Diego has lost eight horses in just nine days during the opening two weeks of racing season. Six died after racing injuries and two were lost during training and exercise.

CBS8.com reports that half of the horses racing at Del Mar Thoroughbred Club racetrack had to be euthanized after racing on the track's new turf course, a wider racing surface that officials had said would be safe enough for 14 horses.

Horse and Rider Enter State of Co-Being

The turf track has been temporarily closed for maintenance.

A 2012 report from the New York Times on horse and jockey injuries said that on average 24 horses die each week at American racetracks. The website Horseracing Wrongs maintains a record of the names of the hundreds of horses in the United States that have been listed as either dead or "broken down" in just this year alone.