from usatoday.com: The ongoing food frenzy comes down to this: buy or be bought. "Think of it as a Pac Man for companies," says Michael Silverstein, senior partner at the Boston Consulting Group. If you don't swallow someone else, they may swallow you. Perhaps that's why even giant Tyson Foods got into the melee Thursday when it offered $50 a share — about $6.8 billion — in an all-cash deal to purchase Hillshire Brands, which makes Jimmy Dean sausage and Ball Park hot dogs. Earlier this week, Pilgrim's Pride offered about $6.4 billion for Hillshire. Never mind that earlier this month, in a possible move to thwart Pilgrim's Pride, Hillshire bid $4.2 billion for Pinnacle Foods.