The saleable yield of a Gloucestershire Old Spot Hog, cut in the American style, is 71%. The overall percentage of lean muscle using the industry formula based on backfat at 1st and 10th rib, loin eye area and hot carcass weight is 46%. Cut for Charcuterie, the saleable yield is 71%, not including bones, trim and backfat.
Perry, Bob, "Heritage Hog Carcass Yields: Gloucestershire Old Spots Hog" (2014). Heritage Hog Carcass Yields. 5.