Beef packer margins slipped modestly for the first time in four weeks, declining $15/head to -$78 as fed cattle prices firmed while boxed beef values continued to weaken. The Choice cutout eased another $2.63/cwt to $364.69, while dressed cattle prices fell only $2.76/cwt to $362.25/cwt, limiting the recent recovery in packer profitability. Even so, packer losses remain substantially smaller than those seen earlier this summer as cattle prices have retreated from their record highs. Feedlot placement margins improved for a second straight week, recovering ...