Key Facts: Size: Large Height: Above 54 cm (21 inches) Weight: About 30 kg (66 lb) Life Span: 13 years Grooming: Very demanding Exercise: Medium Feeding: Medium Temperament: Friendly & outgoing Country of Origin: England AKC Group: Herding Other Names: Bobtail Physical Characteristics: General Appearance: Ambling walk, shaggy, strong and compact. Colour: Grey, grizzle, blue or blue merle, with or without white markings. Coat: The outer coat is shaggy, hard in texture and harsh. The undercoat.