Merck halts Zilmax sales, to study cattle feed additive

By Theopolis Waters and Tom Polansek CHICAGO (Reuters) - U.S. drugmaker Merck & Co said on Friday it is temporarily suspending sales of its Zilmax animal feed additive in the United States and Canada following concerns about use of the product, which is given to cattle to increase their weight before slaughter. Zilmax has been the focus of attention in the livestock industry since Tyson Foods Inc announced last week it will no longer accept Zilmax-fed cattle for slaughter. ...



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