An Icy blast tugged temperatures well below zero degrees in a large swath of the South on Thursday, leaving ranchers and farmers fretting about their animals after a winter storm dropped 2 feet of snow on parts of Arkansas and Oklahoma and left at least three people dead.Forecasters predicted lows of minus 11 degrees in northwest Arkansas and minus 10 degrees in parts of Oklahoma. But by early morning, temperatures had dipped to minus 18 in Fayetteville and to minus 27 in Bartlesville, Okla., according to the National Weather Service.In an area of the nation unaccustomed to such snow and subzero temperatures, those numbers had cattlemen such as Paul Marinoni crossing their fingers that pregnant cows won't give birth during the coldest hours. The newborns could stick to the ground, much like tongues on a flagpole, and die, Marinoni said.“How do you prevent it?” Marinoni, 70, said from his farm outside Fayetteville. “You can't.”Marinoni said he leaves the cows out overnight because they're too messy to stay inside a barn. Even before the temperatures dipped to well below zero, some cows had collected fins of icicles down their backs as the snow.“There ain't no way to keep them warm,” he said.