The Dorking breed is one of the oldest domesticated breeds, originating during the period of the Roman Empire, and taken to England during the Roman Conquest of that nation. Dorkings are gentle natured, shy, and sweet birds. One unique feature is that they have five toes instead of the standard four. These rare heavy birds generally weigh in about seven to eight pounds. They are an endangered breed, so making them a part of your flock will help ensure their continued survival.