Tyson's $6.8 Billion Bid For Hillshire Could Spark Bidding War

Tyson Foods Inc. (NYSE:TSN) has offered to buy Hillshire Brands Co. (NYSE:HSH) for $6.8 billion, upstaging Pilgrim's Pride Corp.'s $6.4-billion bid and signaling a high-stakes food fight for the seller of Hillshire and Jimmy Dean sausages.