What's in your Meat?

We have no idea, and thanks to the Bush administration we legally can't find out:

A federal appeals court has ruled that the government can prohibit meat packers from testing their animals for mad cow disease. Because the Agriculture Department tests only a small percentage of cows for the deadly disease, a Kansas meatpacker, Creekstone Farms Premium Beef, wanted to test all of its cows, but the government says it cannot. Larger meat companies worry that if Creekstone is allowed to perform the test and advertise its meat as safe, they could be forced to do the expensive test, too. The United States Court of Appeals for the District of Columbia Circuit said restricting the test was allowable.

Via Ezra Klein; see also Dean Baker wondering where all the free-marketers went.