At an Ames conference appearance this week, U.S. Agriculture Secretary Tom Vilsack noted that Iowa firms have an opportunity to make money by manufacturing equipment related to cage-free egg production. Vilsack said McDonald's and other large restaurant chains and other businesses have switched to cage-free eggs, and the demand is stacking up. This cage-free egg thing is going to be huge because all of these companies like McDonald's decided to announce at the same time they are going to use only cage-free eggs. "No one bothered to ask if we have enough cage-free eggs," he said, smiling.