The third generation usually destroys a family business, but Jim Perdue ended up growing his century-old poultry company tenfold by focusing on all-natural premium meats—beyond chicken—and not following the flock. In a sheltered bit of the Chesapeake Bay in front of Jim Perdue’s home in Berlin, Maryland, the scion of America’s most famous chicken family raises clams. Each year he sells about a thousand to local crab shacks. The rest are eaten by the Perdue clan. The clam farm is the last