The Portuguese Sheepdog (Portuguese: cão da Serra de Aires, literally 'dog of Serra de Aires') is a medium-sized breed of dog of the herding dog type, and is one of the indigenous regional dogs of Portugal. Portuguese Sheepdog is a medium-sized dog, standing 45 to 55 cm (17½ to 21½ ins) at the withers for males (females slightly smaller) and 17 to 27 kg (37 to 60 lbs) in weight. The dog's body is long and has a long coat without an undercoat, of medium thickness and described as having a 'goat like' texture.[clarification needed] The lack of an undercoat makes the dog less resistant to extreme weather as a working dog.[citation needed] Typical coat colours include yellow, chestnut, grey, fawn, wolf grey (fulva e a lobeira), and black, with tan marks. White hairs may be mixed in with the coat, but there should be no large white patches. (Source: Wikipedia.org, CC BY-SA)