The use of antibiotics in farm animals is coming under increasing criticism by those who believe the patients farmers are really treating are themselves and their fellow humans. Research has found using the drugs causes some dangerous animal-borne bacteria to become resistant to even the most powerful antibiotics, creating untreatable "super bugs' which can infect humans. Farmers say antibiotics are a longstanding tool they need to raise livestock and poultry efficiently. Mainstreet Radio's Mark Steil reports.