It’s the Trivial Pursuit question every dog lover knows the answer to. What breed has a blue/black tongue? The Chow Chow, of course (because this version of the game is older than the Shar-Pei’s kennel club recognition). In reality, other dogs can have this feature, but their tongues are spotted and uncommon. A pink tongue for the Chow Chow or Shar-Pei is considered a disqualifying fault. However, there is a third, rare breed that shares this characteristic, the Chinese Chongqing Dog.
The Chongqing has yet to be recognized by any major kennel club. Its numbers are low, even in its native China. Like the Chow Chow and Shar-Pei it is thought to be an ancient dog, this one hidden in the region of what is now Chongqing Province.
Exactly how old are these breeds? This is a question that is difficult to answer. Both the Chow Chow and Shar-Pei continue to show in DNA testing as some of the oldest, most primitive dogs. (To my knowledge the Chongqing has not been tested.) However, this doesn’t tell us how long they have existed - or when they both existed. It's the age old question, which came first, the Chow Chow or the Shar-Pei?