Tyson Foods values its proposal at $6.8 billion, including debt.The takeover bids by Pilgrim's Pride and Tyson Foods are being driven by the desirability of brand-name, convenience products like Jimmy Dean breakfast sandwiches. Those types of products are more profitable than fresh meat, such as chicken breasts, where there isn't as much wiggle room to pad prices.While Pilgrim's Pride and Tyson both sell such products, their businesses have been more focused on supplying supermarkets and restaurant chains.Both offers are contingent on Hillshire abandoning its plan to acquire Pinnacle Foods Inc., which makes Birds Eye frozen vegetables and Wish-Bone salad dressings. Some investors had questioned the wisdom of that deal, given the outdated image of some of Pinnacle's brands and the differences in the two companies' product portfolios.In its statement issued Tuesday, Hillshire noted that it can't just scrap its deal with Pinnacle.