bandofan:
Minneapolis, Omaha, and Sioux City were among the largest stockyards in the country. I don't know anything about Mather cars, but I can tell you a great deal about Sioux City. We have the honor of being one of the top 3 livestock markets in the US. At one time Sioux City led the US in hogs, the number one market. Minneapolis usually led. We had Armour, Cudahy, Swift, Needham, Sioux City Dressed Beef, Raskin pack. The Illinois Central hauled the most carcass to Chicago. We had 5 major railroads, one of the smallest cities with 5 feeds, IC, GN, CB&Q, GN, and Milwaukee. We also had the Sioux City Transfer Railroad to haul cars across the stockyards area.
I realize that Illinois, Ohio and Indiana produced a lot of carcass beef and hogs. In the mid 1960s a small beef packer in Denison, Iowa started processing boxed beef, that is cut into meat market ready steaks, etc. Across the river in Dakota City, NE is now the largest packing plant. That company was called Iowa Beef Packers, the Iowa Beef Producers, and then Tyson.
Just a brief history on meat packing.
Dick