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Published January 06, 2014, 09:34 AM

Lost hooves, dead cattle before Merck halted Zilmax sales

The U.S. beef industry’s dependence on the muscle-building drug Zilmax began unraveling on a sweltering summer day, in the dusty cattle pens outside a Tyson Foods Inc. slaughterhouse in southeast Washington state.

By: P.J. Huffstutter and Tom Polansek, Reuters

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