Donald F. Smith, dean of the college of veterinary medicine

UNITED STATES - MARCH 30: Donald F. Smith, dean of the college of veterinary medicine at Cornell University, speaks reporters at a news conference about the recent pet food recall, March 30, 2007 in Rockville, Maryland. U.S. investigators found a substance used to make plastic kitchen utensils and fertilizer in samples of pet food blamed for killing at least 16 cats and dogs, prompting the recall of 60 million cans of Menu Foods Ltd. products. (Photo by Stephanie Kuykendal/Bloomberg via Getty Images)