4/24/2012 1:20 PM

On April 24, the USDA announced the nation's fourth case of bovine spongiform encephalopathy (BSE), sometimes called mad cow disease, in a dairy cow from central California. Dr. John Clifford, USDA's chief veterinary officer, answers a series of questions about this BSE case.

Are livestock farmers in your area prepared to clean up their manure spills?

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  Ag Markets at Lancaster Farming

7/31/2015 | Last Updated: 1:15 AM