The Standard of Perfection (SOP) is the official guide of standards for all recognized chicken, bantam, duck, turkey, and goose breeds in terms of confirmation, comb type, feather color, legs, toes, disqualifications, and other attributes. The SOP has both full-color and black-and-white illustrations and is put out by the American Poultry Association. The SOP also includes requirements for exhibitors, judges, poultry exhibits, and also technical terms.
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