Northwest and Allee Research and Demonstration Farm
A variety of systems are currently used for farrowing naturally raised pigs in cold weather. All generally rely upon a primary heat source capable of maintaining a room temperature of 50°F and auxiliary heat sources (heat lamps, bedding pack, hovers) to create a warmer microclimate for the young pigs. Hoop barns have been rapidly adopted by many niche market pork producers, primarily for finishing animals. With a growing interest in producing pigs for the naturally raised pork market, the National Pork Board, in cooperation with Iowa State University and private individuals, formed a committee to design a farrow-to-finish system utilizing one hoop barn per group of pigs.
Iowa State University
Lammers, Peter J. and Honeyman, Mark S., "Farrow-to-Finish in a Hoop Barn: A Demonstration" (2005). Iowa State Research Farm Progress Reports. 1279.