Cattle and calves on feed for the slaughter market in the U.S. was 1 percent below October 1, 2020.  Placements in feedlots during September totaled 2.16 million head, 3 percent below 2020.  Marketings of fed cattle during September totaled 1.79 million head, 3 percent below 2020. Other disappearance totaled 58,000 head during September, unchanged from 2020. ...