Mix flour, cornmeal, milk and egg in a large bowl. Set aside. Fry bacon, then place it in a food processor with any grease left in the pan. Process, then mix remaining ingredients in the food processor. Add the contents of the food processor to the flour mixture and stir well. Roll the dough out on a floured surface. Cut into bone shapes or squares. Bake 15 minutes at 350°F. Let cool completely, then store in refrigerator. The treats will get crunchier in the refrigerator.