Posted on Tue, Oct. 05, 2004 Officials investigate why 11 horses suddenly died Associated Press MADELIA, Minn. - Veterinarians and university researchers are still trying to determine why 11 of Ann Hoppe's 32 horses suddenly died last week. "That's the hardest part," Hoppe said. "The (veterinarians) were just absolutely dumbfounded. ... They thought they would find obvious signs when they got into the autopsy. They haven't found that yet." On Sept. 27, three of Hoppe's horses became ill. Veterinarians from New Ulm couldn't determine the cause of the sickness. The next day, those horses and eight others died. The vets...