Beef packer margins deteriorated sharply to -$167/head last week, down $89 from the prior week as fed cattle prices rebounded while the Choice cutout continued to weaken. The cutout slipped to $363/cwt, while fed cattle prices climbed to $235/cwt, reversing much of the recent improvement in packer spreads. Despite the setback, losses remain considerably smaller than the extreme levels seen earlier this summer. Feedlot placement margins were...