A horse suffered a heart attack and died while racing Saturday on the Polytrack course at the Del Mar Thoroughbred Club in San Diego County. Track officials say the 3-year-old horse  was running in the third race, when he collapsed near the finish line  and died from an apparent heart attack.
"Chatting Gambler" is one of several horses to die at Del Mar since racing began on July 17.

Posted by Ronnie Loaiza