Horse Deaths Tied To Mystery Toxin

((HT: Miami Herald/Beasley, Vasquez, Gunson))The horrific public deaths of 21 horses before a polo match likely were caused by a toxin that could have been in tainted food, vitamins or supplements, a veterinarian who treated one of the horses said Monday.''Something that was given to these horses caused this toxic reaction,'' Dr. Scott Swerdlin, who treated one of the sick horses at Palm Beach Equine Clinic near the Wellington polo grounds, told reporters.Another veterinarian at the scene said something triggered heart failure among the horses.''Well clearly, it's an intoxication, clearly there's some sort of a poison,'' Dr. James Belden told NBC's Today show.Authorities have opened an investigation into the deaths but said there is no evidence of intentional criminal wrongdoing. The Palm Beach Sheriff's Office and the Office of Agricultural Law Enforcement are working together to determine what killed the competitive equines at the In...