Grains stage a nice rally on Wednesday with fund short covering and corrective buying plus the pullback in the U.S. dollar index was also supportive.  News that Russian authorities have halted grain exports on ships belonging to Aston, one of the biggest local grain trading houses, in an effort to expand a quality probe propped up prices. More HPAI cases, now in an Ohio dairy, also caused more fund long liquidation in cattle.  While not as volatile, the milk markets have slowly ground lower on HPAI news but saw a big selloff prior to the outbreak on slower demand.  Bryan Doherty, Total Farm Marketing, has more.  See omnystudio.com/listener for privacy information.