Farm Commodity Fair Labeling Act of 2003 - Amends the Agricultural Marketing Act of 1946 with respect to country of origin labeling provisions to: (1) extend coverage to poultry products (chicken or turkey) and muscle cuts and ground meat from goats; (2) extend United States country of origin coverage to goats and poultry products; and (3) exempt a retailer from the September 30, 2004, consumer notification requirement if a covered commodity is derived in whole or in part from an animal born, or likely born, before October 1, 2004, but whose birthdate is not readily identifiable.