Grains end lower on heavy deliveries against the May soybean oil and Chicago wheat contracts, end of month profit taking and the fast planting pace.  Plus, outside markets were risk off with the stock market lower and the dollar higher, which also weighed on cattle.  Although Kent Beadle with Paradigm Futures says cattle also saw end of month positioning and fund liquidation for a second day with USDA testing ground beef in state impacted by H5N1.  Hogs ended mostly lower with the futures premium to a softening lean hog index.