The breed, known as Brussels Griffon in english, refers to three more breeds than an old established breed of rare breed dog does. Chiari-like malformation has has become very widespread in this breed.
The Stabyhoun or Stabij is one of the top five rarest dog breeds in the world. 
 The Griffon Bruxellois may refer to three different breeds, the Griffon Bruxellois, the Griffon Belge and the Petit Brabanon. 
Rare breed (dog) is any breed of dog that is small in number and is used to refer to both old established breeds such as the Stabyhoun and Glen of Imaal Terrier or newer creations. 
 CM is rare in most breeds but reportedly has become very widespread in the Cavalier King Charles Spaniel and the Griffon Bruxellois (Brussels Griffon). 
