When it comes to bourbon production, corn must be its key ingredient. And thereâs not a day that goes by that corn isnât being unloaded at Green River Distilling Co. in Owensboro. On Dec. 14, Isaac Brown of Brown Farms in Beaver Dam, was there unloading a semitrailer of corn. Brown said most of his corn is sold to Perdue Farms as chicken feed, but that he does appreciate that a portion of his grain is being used in bourbon production. âItâs cool coming here and knowing that a product youâre growing is going into their product theyâre making and itâs distributed all around the world,â Brown said.