Kraft Foods Inc., the maker of Oscar Mayer wieners, and Sara Lee Corp., owner of Ball Park franks, are in federal court in Chicago, where a judge will determine whether either company broke false-advertising laws in efforts to become the nation's top dog. (AP Photo/Charlie Neibergall, File)

Photo by: Charlie Neibergall

Kraft Foods Inc., the maker of Oscar Mayer wieners, and Sara Lee Corp., owner of Ball Park franks, are in federal court in Chicago, where a judge will determine whether either company broke false-advertising laws in efforts to become the nation's top dog. (AP Photo/Charlie Neibergall, File)