The Burger Wars are becoming the biggest food fight since that cafeteria scene from the movie "Animal House". The two burger giants, McDonald's and Burger King, have each been cloning the other's top products in the bloody battle for the big burger buck. Burger King stepped up first with the Big King -Burger King's version of the McDonald's Big Mac. Yes, it had two all beef patties, special sauce, lettuce, cheese, pickles, onions, on a sesame seed bun; although everything was arranged a bit differently, and there's no middle bun in there. Then McDonald's rolled out the Big N' Tasty, which bore a striking resemblance to Burger King's Whopper, with fresh lettuce, tomato, and onion on top of a huge beef patty. Who's winning this fight by leveraging the popularity of the other company's product? Nobody, really. McDonald's chose to alter its Big N' Tasty recipe by making it smaller n' cheaper, then changed the name to Big Xtra!, while Burger King bailed out on the Big King altogether. But thisfood fight is far from over. More recently Burger King tweaked its french fry formula in an unsuccessful attempt to steal away fans fromMcDonald's winning fried spuds recipe. And McDonald's has added more breakfast sandwiches to compete with Burger King's wider wake-up selection. So the war continues. And thebattlefield is splattered with ketchup.