Fifteen cows from a herd on a northern Indiana dairy farm died last week after ingesting a pesticide. The Board of Animal Health has placed the farm under an emergency order prohibiting the movement of animals or products. Milk produced at the Starke County farm run by Randy Johnson 25 miles southwest of South Bend is being inspected for potential contamination with the pesticide Aztec, used to control pests in corn fields. As yet there have been no confirmed reports of people becoming ill, and the risk of illness among anyone consuming the products is said to be low.