For McDonald's, the Chicken McNugget, the flagship product of further processed chicken, represented a once-in-a-generation innovation, a snack item that quickly evolved into a meal, spawned a legion of imitators, and gained a large share of the global poultry market. Yet, almost as soon as the McNugget made its North American debut, it quickly became the subject of opprobrium and ridicule, taking on a symbolic status among serious food connoisseurs...