What you say is true, for example Earthgrains, Grandma Sycamore, and Sarah Lee are the same company and in Utah the Sarah Lee bakery by Salt Lake City makes the bread and hot dog buns for Costco, and Great Value, Western Family, and Kroger brands but they use a reduced formula for the store brands. They also produce all the hamburger buns for just about every fast food restaurant besides McDonald's (they have a couple of bakeries dedicated to just them and have the buns frozen and shipped to their stores). Also Great Value brand milk and Target's milk are processed by Meadow Gold, the only thing different between all of them are the labels. Each factory is assigned a code and if you look on the packaging then you can see what products were produced in the same plant. It will be with the expiration date and lot codes. Also, something that isn't too widely known by consumers is that General Mills produces all of the ready made, refrigerated Pillsbury products while Smuckers owns the rights to all the dry goods and frosting products. General Mills also has the international rights to Hagen Daas but not the domestic.