U.S.-based Wal-Mart Stores Inc., which arrived in Canada in 1994, started to add massive Supercentres with full fresh-food offerings in November, 2006, taking a bite out of business from other supermarkets and retailers. Its new food focus prompted domestic grocery leader Loblaw Cos. Ltd. to launch a major overhaul of its business, resulting in massive problems which it was forced to patch up in past years.