Grains end higher Friday with chart breakouts leading to technical buying and fund short covering.  The market is trading U.S. and South American weather and crop concerns, but the lower dollar helped.  Can the rally be sustained?  Don Roose, U.S. Commodities, has the answer.  Plus, live cattle end higher Friday with higher cash trade, but can it put bird flu fears behind it?  And hogs end lower Friday and for the week with the futures premium to the cash index dragging down the market.