Peggy Lowe / Harvest Public Media


When the people from the drug company came out to visit Tyler Karney at Ordway Feedyard here on Colorado’s eastern plains, he was a little skeptical.

They said their product, Zilmax, could put another 30 pounds on an animal in the last days before slaughter. Then he started blending it into the feed for the 6,500 head of Holsteins at this huge feedlot.