Presently, no U.S. horse slaughterhouses have been approved for USDA inspections, although several have applied.

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Consumer groups point out that the USDA has found problems with state-approved plants, including dirty cutting boards and meat cooked at incorrect temperatures, potentially exposing consumers to bacteria.

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Although the U.S. hasn't approved Chinese chicken for human consumption, the USDA is working with China to lift that ban.

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