Officials in Florida are puzzled after 21 polo horses died during the warm-ups for a match Sunday and Monday.
The Venezuelan horses were supposed to be playing in a match in Wellington, Florida, but two collapsed and several others looked dizzy and dazed when they were unloaded from their trailer.
Seven horses died at the scene and the rest while being treated elsewhere or en route to medical care. Officials think they may have ingested some type of poison.
While veterinarians are waiting for test results to determine why the horses fell ill and died, many people in the horse industry, including here in Kentucky, are examining their standards when it comes to horse safety at big events.
The director of the Rolex Three-Day Event at the Kentucky Horse Park says security measures taken for the event will be a good test run for the security needs at the 2010 World Equestrian games.