Cattle and calves on feed for the slaughter market in Idaho from feedlots with a capacity of 1,000 or more head on May 1, 2010 totaled 210,000 head, the same as May 1, 2009, according to the National Agricultural Statistics Service. The cattle on feed inventory is up 5,000 head from the April 1, 2010 inventory of 205,000 head. Placements of cattle in state feedlots with a capacity of 1,000 or more head during April totaled 27,000 head, down 3,000 head from April 2009 placements. Marketings of cattle from feedlots with 1,000 head or more during April totaled 21,000 head, down 8,000 head from the same month a year ago. Other disappearance totaled 1,000 during April.