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More than 60,000 dogs in about 350 labs in the U.S. are used for testing and research, most commonly for products such as drugs, pesticides and medical devices, according to the Humane Society of the United States. (Associated Press/File)

More than 60,000 dogs in about 350 labs in the U.S. are used for testing and research, most commonly for products such as drugs, pesticides and medical devices, according to the Humane Society of the United States. (Associated Press/File)

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