The Chien-gris is now extinct, while another type of dog is not. This dog breed is one that is specifically bred to have Canine follicular dysplasia.
The Chinese crested dog is a hairless breed of dog. 
 Like most hairless dog breeds, the Chinese crested comes in two varieties, with and without fur, which are born in the same litter: the Powderpuff and the Hairless. 
The Chien-gris a.k.a. Gris de Saint-Louis ("Grey St. Louis Hound") was a breed of dog, now extinct, which originated in Medieval times. 
 Certain breeds, such as the Mexican Hairless Dog and Chinese Crested Dog, are bred specifically for alopecia. 
