Dorset Horn and Poll Dorset Sheep Breeders' Association Dorset Sheep the only sheep breed that can breed all year around - ideal for controlling your lambing times. The Dorset Horn sheep is one of the earliest recorded breeds of British Sheep with the first Flock Book being established in 1892, and its adaptability was soon recognised world wide. Dorsetsheep.org~Site InfoWhoisTrace RouteRBL Check