Dempster's brand bread, a product of Maple Leaf Foods. Maple Leaf Foods Inc. is a major Canadian food processing company, founded in 1927 as a merger of several major Toronto meat packers.The company was originally known as Canada Packers. It was founded in 1927 as a merger of several major Toronto meat packers, most prominently William Davies Company and was immediately Canada's largest food processor, a title it would hold for the next sixty years. Its main business was pork, and its massive operations processing hogs for export to the United Kingdom helped Toronto earn its nickname 'Hogtown.' Moving into western Canada it became Canada's largest beef slaughterer.