** FILE ** In this July 9, 2009, file photo Dr. Craig Rowles stands with hogs in one of his Carroll, Iowa, hog buildings. (AP Photo/Charlie Neibergall, File)
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** FILE ** In this July 9, 2009, file photo Dr. Craig Rowles stands with hogs in one of his Carroll, Iowa, hog buildings. (AP Photo/Charlie Neibergall, File)
