October hogs closed slightly lower while December hogs closed sharply lower for the session Monday, as the market gave back some of last week's gains. While pork product prices were higher on Friday afternoon, many traders see the large slaughter levels last week along with expectations for continued large slaughter ahead as factors which are likely to pressure pork values. The weaker cash market and ideas that the cash market could see further weakness over the rest of this week was thought to have pressured the market early. A more positive outlook for outside market forces as well as ideas that the USDA Hogs and Pigs report is unlikely to show much expansion or contraction of pork supply has helped the market consolidate during recent days. While hog prices have been high and expansion may become a consideration, high feed prices may have helped to limit ideas of expansion. Most traders see September 1st hog supply total and kept for market near 100.5% of last year, with kept for breeding just slightly higher than last year. However, those traders see the June-August pig crop down about 1% from last year due to lower breeding efficiency in July from excessive heat. The CME Lean Hog Index as of September 22nd came in at 90.89, up 37 cents from the previous session and up from 87.69 the week before. The estimated hog slaughter came in at 425,000 head yesterday. This was unchanged from last week but up from 412,000 head a year ago as this time. Pork cutout values released after the close yesterday came in at $97.81, down 3 cents from Friday but up from $95.89 the previous week.