Grain and livestock markets close mixed Thursday.  Bryan Doherty, Total Farm Marketing, says corn is hit by profit taking and farmer selling after running into chart resistance and that pulls the wheat market lower.  Soybean held their own still holding chart support with solid weekly exports and a 12.3 million bu. sale of soybeans to unknown destinations, plus the South American crop is not made just yet.  Cattle futures made new highs for the move with the volume of cash trade steady to $3 higher and with higher cutouts but then failed.  So is it a reversal or a top?  Milk and product prices soar on Thursday, what was behind the move and how much upside is there?