sentences:  Cattle, hogs, sheep, buffalo, deer, horses, mules and chickens were sold on the market in early years.By 1888, the "Big Four" packing companies, which included Hammond’s, Fowler Brothers, Swift & Company, and Armour-Cudahy, were operating in Omaha.Among the four companies, South Omaha companies processed more than 1 million cattle, hogs and sheep each year.