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St. Paul, Minn.

Food additives and safety

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Tainted pet food
Cans of pet food are seen on the shelf at a grocery store April 12, 2007 in San Francisco, Calif.
Photo by Justin Sullivan/Getty Images
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Tainted pet food
Cans of pet food are seen on the shelf at a grocery store April 12, 2007 in San Francisco, Calif.
Photo by Justin Sullivan/Getty Images