Straw in small and large squares available. Corn screenings available by the bag. Buyer of bad hay or straw. Straw varieties come from the cutting or harvesting of small grains such as rye, barley, wheat, and oats. The corn screenings are gathered through a process of running grain through the elevators and separated based on quality to ensure a good reputation at all feed mills. Which results in less quality material funneled into separate grain bin storage.