Twenty-one horses dropped dead at a polo game in Wellington, Florida on April 21, 2009. The veterinarians that checked them out said that it was a heart failure, probably from tainted food, vitamins, or supplements. How it happened was simply by those horses eating the food, vitamins, or supplements that were tainted. I think it is terrible that all those horses died. I love horses and to hear about twenty-one of them dying is horrible. The owner of the horses should’ve made sure that their food was okay, just to make sure that they wouldn’t get killed.