DES MOINES, Iowa -- Dr. Ron Plain, University of Missouri agricultural economist, discusses the debate over the use of gestation-sow stalls and how the move away from the housing system could harm both pigs and consumers.

Plain visited with AgriTalk, Pork Network's sister broadcasting entity at this year's World Pork Expo in Des Moines. He also reported on a recent survey that showed just 17 percent of the U.S. sow herd is housed in a group-pen system as some point in their productive life.