From the Document: "Avian influenza viruses and other pathogens that impact domestic poultry often cause little or no illness in wildlife. For this reason, apparently healthy wild birds and mammals could spread disease onto farms when they are attracted to areas with abundant food, water, and/or shelter. You can build on and enhance your farm biosecurity by putting wildlife management practices in place. There are several nonlethal ways to make farms less welcoming to wildlife. Waterfowl, as well as other birds and mammals, are attracted to water for drinking, bathing, feeding, and loafing. The practices below can help you manage water resources at your farm to prevent wildlife from coming into direct contact with your poultry, as well as to avoid accidentally transporting wildlife fecal material and secretions into your facilities on boots, equipment, and food."
U.S. Department of Agriculture: https://www.usda.gov/