Meat from a Holstein cow infected with mad cow disease may have been more widely distributed than initially believed, reaching retail markets in eight states and Guam, federal officials said yesterday ...

Holstein steers that get hormone implants grow faster than those that do not receive the implants, and they get as big as beef cattle breeds, according to Penn State researchers, who say that's good ...

WASHINGTON (AP) -- Genetic testing confirms that the cow diagnosed with the first U.S. case of mad cow disease was born in Canada, agriculture officials said Tuesday. The finding puts new emphasis ...