 These include trickle feeding systems, individual feeding stalls, and electronic sow feeding equipment, all of which resolve feed competition among pigs.Early veterinary studies seemed to support the use of gestation crates.According to the U.S. National Pork Producers Council, which promotes pork as a food product and is a leading proponent of gestation crates, the American Veterinary Medical Association "recognize[s] gestation stalls and group housing systems as appropriate for providing for the well-being of sows during pregnancy."