Walk into any of the major fast-food establishments and you’ll find items that don’t exactly seem like fast food. Apple pecan chicken salads, bacon portabella burgers, yogurt parfaits and caramel mocha iced coffee drinks are all part of fast food’s strategy to compete with the rise of so-called fast-casual restaurants like Five Guys, Chipotle and Panera Bread — places that offer better-quality items but don’t include full table service. Fast-food mainstays like McDonald’s, Wendy’s and Burger King have revamped their menus after seeing the fast-casual crowd — restaurants that have dramatically increased their outlets as well as same-store sales — bite into their business. But it’s unclear whether the moves will work. McDonald’s, which has reported some rare sales slumps recently, may be suffering from a focus on its more premium items. While it’s evident that consumers like the sorts of items offered by restaurants like Panera and Chipotle, they might not want those items from fast-food establishments.