 Get rid of those internal parasites and lice that have affected your cattle throughout the winter by taking advantage of Powell Feed and Milling's special Poron Warmer. $58 on Saturday only during the month of June for Ivermax and Ivermectin 5-liter containers. That's right, $58 on Saturday only for Poron Warmers at all Powell Feed and Milling locations. So hurry over and take advantage of this offer.