Distilleries in Kentucky make 95 percent of the world’s bourbon, as well as a variety of other spirits. Distilling spirits requires the use of many different grains, including corn, wheat, rye, and barley.
After the grain is used in the distillation process, it is left over as a by-product. Distilleries often work with farmers to use the leftover grain as a livestock feed. Since the distillery industry has grown quickly over the past few years, there is much more distillers grains available than in the recent past.