Question: are chows the only dogs with black tongues?
Answer: The Chow is one of the most ancient breeds and is the ancestor of many breeds of today. The orgin of the Chow's black tongue is a mystery; we don't know how or why he came to have it. We do know that the Chow is not the only breed with a blue-black tongue. The Chinese Shar-Pei shares this trait as well.