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Dairy cows feed in a 2010 file image. A Florida cow has turned up with a form of mad cow disease, the sixth to be confirmed in the U.S. and first in Florida since the disease was diagnosed in the mid 1980s

Dairy cows feed in a 2010 file image. A Florida cow has turned up with a form of mad cow disease, the sixth to be confirmed in the U.S. and first in Florida since the disease was diagnosed in the mid 1980s