Don Roose U.S. Commodities says grains end lower Thursday on technical selling, a lack of bullish news and the higher dollar.  He says live cattle also fell on profit taking and caution ahead of the Cattle on Feed and seasonal demand weakness.  Meanwhile feeder futures continue to be pushed by strong cash and tighter numbers.  Lean hog futures shook off the higher dollar to trade higher with the funds long and the futures at a discount to the cash index.