Aaron Ogren, 30, of Exeter, Nebraska, has been arrested and charged with multiple counts of animal cruelty after more than 200 cattle died on a feedlot.
Scientists from USDA developed the tools to mass produce penicillin, which was used for treating wounded soldiers over 70 years ago during World War II.
Cattle are generally doing fine in spite of the winter weather. Their rumens are keeping them warm, said Travis Mulliniks, beef cattle nutritionist with the University of Nebraska-Lincoln Extension.