In May of 2018, backyard chickens in Los Angeles County, California began to die – first in one backyard, then in another, then in many, many more. It was the beginning of the spread of a terrible scourge known as Virulent Newcastle Disease (vND), a contagious and deadly viral disease that affects birds. By January 2019, in spite of the heroic efforts by staff of the US Department of Agriculture and the California Department of Food and Agriculture, not only had vND found its way into large commercial flocks, it continued to spread through many, many more backyard flocks southern California.