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Apr 30, 2009 | 5
The 21 polo ponies that dropped dead at the U.S. Open Polo Championship in Wellington, Fla., eleven days ago most likely succumbed to an overdose of selenium, used to help muscles recover after strenuous exercise, the Florida Department of Agriculture and Consumer Services has reported.
The source of the toxic overdose appears to be supplement injections the horses received a few hours before they began falling to the ground. Franck's Pharmacy in Ocala, which filled the prescription for the supplement—a cocktail of selenium, vitamin B-12, potassium, and magnesium -- has owned up to the mistake: "The strength of an ingredient in a medication Franck’s Pharmacy prepared for the 21 horses on the Lechuza Polo team was incorrect," Jennifer Beckett, the pharmacy's chief operations officer, said in a statement. "We can confirm that the ingredient was selenium."
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