Lauren and Christoph Herby walk through the forest on their property with their dog, Laika on March 9, 2020. Tubes that carry the sap from the black walnut trees can be seen at left. Tonoloway Farm, a first-generation syrup operation run by Christoph and Lauren Herby in Highland County, is believed to be the only commercial producer of walnut syrup in Virginia. © Heather Rousseau/The Roanoke Times via AP