The Chow-Chow has been identified as a basal breed that predates the emergence of the modern breeds in the 19th Century. The breed is known for a very dense double coat that is either smooth or rough. This breed of dog has many strong loyal bonds with friends and family, but the Chow-Chow dog is usually overly protective of one or two main family members. It is in the breed's nature to be quiet and well-behaved, but it is also resistant to training.