Health: USDA orders silence on mad cow in Texas: ‘The U.S. Department of Agriculture has issued an order instructing its inspectors in Texas, where federal mad cow disease testing policies recently were violated, not to talk about the cattle disorder with outside parties … The order … was issued in the wake of the April 27 case at Lone Star Beef in San Angelo, in which a cow displaying signs of a brain disorder was not tested for mad cow disease despite a federal policy to screen all such animals.’