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WASHINGTON (AP) - Imported ingredients used in recalled pet food may have been intentionally spiked with an industrial chemical to boost their apparent protein content, federal officials said Thursday.
That's one theory being pursued by the Food and Drug Administration as it investigates how the chemical, melamine, contaminated at least two ingredients used to make more than 100 brands of dog and cat foods.
In California, state agriculture officials placed a hog farm under quarantine after melamine was found in pig urine there. Additional testing was under way to determine whether the chemical was present in the meat produced by American Hog Farm in Ceres since April 3, the state Department of Food and Agriculture said.
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