Originally developed by Mahmoud El-Begearmi, Extension poultry specialist, and H. Michael Opitz, Extension veterinarian. Updated by Donna Coffin, Extension Professor, Richard Brzozowski, Food System Program Administrator, Colt Knight, Assistant Professor, University of Maine Cooperative Extension. Updated by Donna Coffin, University of Maine Cooperative Extension Professor, and Madison Philbrick, UMaine School of Food and Agriculture Graduate