Bad day at Palm Beach

CNN.com has an article about a polo mystery:

Fourteen thoroughbred horses dropped dead in a mysterious scene on Sunday before a polo match near West Palm Beach, Florida, officials said. State and local veterinary teams are trying to figure out what happened at the International Polo Club Palm Beach in Wellington, Florida, as team Lechuza Caracas prepared to compete in a US Open match.
It's unclear what killed the horses, but necropsies and blood tests were being done Sunday, the Palm Beach Post reported. The U.S. Polo Association, the sport's governing body, is expected to open an investigation Monday, the Sun-Sentinel newspaper reported.
Two horses initially collapsed, and as vets and team officials scrambled to revive them, five others became dizzy, said Tim O'Connor, spokesman for the polo club. "A total of seven died on our property," O'Connor told CNN. Seven other horses died as they were transported to a Wellington horse farm and a veterinary hospital. Vets ran intravenous tubes into the horses, struggling to help them breathe, officials told the Palm Beach Post.
Some horses died immediately, but some lingered for about 45 minutes, according to Dr. Scott Swerdlin of the Palm Beach Equine Clinic, the Sun-Sentinel reported. The clinic is the International Polo's consulting veterinarian group, the newspaper said. It was unclear Sunday what caused the horses to die, and necropsies and blood tests were underway, said O'Connor. Each team brings between forty and sixty horses for matches. The ponies are continuously switched out throughout a match to keep them from overexerting themselves, he said. The horses were between ten and eleven years old, and were valued at about $100,000 each, O'Connor said, according to the Sun-Sentinel. A meeting will be held to determine whether Lechuza Caracas will compete at a later date, he said. "Everybody is kind of in shock and trying to figure out what happened," he said. "Nobody can recall an incident in which this many horses have died at once."

Rico says the vets will undoubtedly find some doping going on, or the insurance companies will...