Rancher Mollie Engelhart was at a talk in North Dakota when a man walked up and told her that close to 20 percent of steers were lactating at slaughter. She raises cattle. She milks cows. She'd never seen it once. Then he showed her the research poster, and it was real.
Researchers from West Texas A&M and Cargill evaluated 20,481 finished cattle from 33 feedlots an...