The Kentucky Horse Racing Commission is asking for the public's help with an investigation into an object found Sunday in Barn 21 at Keeneland.
Barn 21 is the TCO2 testing barn. High levels of TCO2, or total carbon dioxide, are associated with "milkshaking," in which horses are given an illegal concoction to help enhance performance.
John Ward, executive director of the racing commission, said the commission intentionally has kept secret what the object is so it can determine whether tips are credible.
"It could possibly (be material to alter the performance of horse) but not necessarily so," Ward said. But it's "nothing serious to the health of a human."
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He said the investigation was continuing.
"We just want the racing community to know we're out there and looking," he said.
Anyone with information should call the commission's Integrity Hotline at 1-866-993-3949 or email KHRC.Hotline@ky.gov. Tips may be provided anonymously.