Legs Like Betty tossed jockey Edgar Prado shortly after the start of the seventh race.
Prado was complaining of chest pain after the spill and was taken by ambulance to a hospital. Legs Like Betty bolted to the main track and was running in the wrong direction on the dirt track before outriders corralled her.
We'll have an update on Prado later, along with a report on the last three races.
Lupo's Way won the seventh, followed by Conquest Dynasty.
Handle, including multi-race, was $995,893 for the seventh race. Total handle for the day should be above $9 million.