date:Dec 31, 2013
the plant near Pasco. Some animal health experts have told Tyson the use of Zilmax is a possible cause, he said.
Tyson had seen some cattle mobility issues in the past, but the issues at Pasco this summer were more severe than the company had seen before, Mickelson said.
QUESTIONS ARISE
Scientists say they have yet to determine whether Zilmax causes ailments so severe that cattle must be euthanized. One theory is that the federally approved feed additive may compound the effects of common fe