This story was originally published on Food Dive. To receive daily news and insights, subscribe to our free daily Food Dive newsletter. General Mills is closing three manufacturing plants in Missouri as the cereal and snacks company aims to make its supply chain more competitive. The closures, part of a multiyear organizational initiative, will impact a pizza crust facility in St. Charles and two pet food locations in Joplin that General Mills acquired as part of its $1.45 billion purchase of Whitebridge P ...