Bologna is less a random “meat mush” and more a tightly regulated, modern descendant of old-world sausage craft. Today’s slices are usually made from beef, pork, chicken, or a blend, finely ground and emulsified into that familiar smooth paste, then cooked and often smoked in either natural or synthetic casings. While people imagine beaks, hooves, and horror stories, U.S. rules and current market demand mean most mass-produced bologna uses standard meat and fat, not the nightmare scraps of urban legend.
