date:May 20, 2013
t decade because earlier programs targeting diseases that affect them have been successful, he added.
Still, tracebacks, in which a sick animal's movements are reviewed as part of the effort to control the spread of a disease, aren't unusual. Dr. Paul McGraw, state veterinarian in Wisconsin, recalled a number done because of tuberculosis in cattle. It's probably safe to say nationwide, there's probably been five or six of those in the last two to three years, McGraw said.
The rules that went i