Of course dairy producers in Wisconsin make most of their money from milk; prices are dropping off for cows sold to slaughterhouses.
Wisconsin has more than a million cows on about 16,000 dairy farms. Typically, about 20 percent of a farmer's herd is sold to beef processors each year.
A typical cow sold for about $1,000 before last week's finding of the first U.S. case of Mad Cow disease.
Since then, prices have dropped to about $500 a cow, so it is showing a negative effect.