Excerpt: The USDA’s National Animal Health Monitoring System (NAHMS) conducted the Poultry 2010 study. One objective of the study was to describe the structure of commercial poultry industries, including interactions among poultry industry segments, movements, and biosecurity practices. An understanding of the industry structure is important for managing disease outbreaks. The Poultry 2010 study was administered to the Nation’s largest broiler, turkey, table-egg layer, and breeder companies, accounting for over 70 percent of their respective industries. Estimates in this information sheet reflect the practices of these large companies only.