China’s hog raising industry is mostly backyard raising at small scale. Since 2005, the opportunity cost of emigrating to urban areas for work has increased and environmental regulations have intensified. As a result, the number of backyard raising households declined substantially and hog raising is now of larger scale. As of 2015, more than 50% of hogs were slaughtered at farms with more than 500 hogs going to market per year. Large-scale production has huge room to improve. In the U.S., the process of scaling up hog raising has almost…