The livestock packing sector continues to see profitability decline as beef and pork prices have been relatively stable while animal costs have risen. Both beef and pork packer margins turned negative last week, though the losses are shallow in the pork sector and deeply red for the beef industry. Feedlot margins also weakened last week due to rising feeder cattle prices and steady fed cattle values. Hog producers saw mixed margin performance as closeout profits dropped on weaker futures and lower basis levels while forward-looking margins improved on higher futures/forward price expectations. ...