Abstract: A highly automated hog housing, feeding and sorting system and method comprising a finishing barn partitioned into two separate pens each capable of holding at least 400 hogs in a large open area, with each room having a living area and central shared but divided feeding area, such that through the adjustment of a gating and fencing system enclosing the feeding area, two pens of hogs can be sorted using a single electronic sorting scale, and wherein hogs are made to sort themselves by weight upon passing through the electronic sorting scale, which designates the animals as either light or heavy, and whereafter a diversion gate ushers them either into the regular feeding area with access back to the living area if they are designated as “light,” or into a separate holding pen if they are designated as “heavy. A sick pen area at each end of the building, having its own feed and water supply, is also provided.