Not only cattle were killed and processed at the Union Stockyards. Millions of pigs were, as well, so many that Chicago surpassed Cincinnati as “Porkopolis” soon after the stockyards began. The term, “Hog Bellies” in agricultural and Board of Trade statistics has real meaning.
Gutting Hogs in a Modern Packing House
Secrets of Meat Curing and Sausage Making. Chicago: B. Heller and Co. (1911) Crerar collection: 664.9 Q803.