Question: Which refers to more breeds, Stabyhoun or Griffon Bruxellois?

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.  Since dogs have greater genetic variability than other domesticated animals the number of possible breeds is vast with new crosses constantly occurring, from these both selected and random crosses may come new breeds should offspring reliably breed true to type.  New breeds from the wild such as the Carolina Dog are quite rare compared to attempts at breed creation from man as found in the American Hairless Terrier which sought to exploit a mutation. <SEP> Chiari-like malformation (CM) is the most common cause of foramen magnum obstruction and syringomyelia in dogs.  Syringomyelia (SM) is a disease of the spinal cord typified by fluid filled cavities, or syrinxes, within the spinal cord substance.  The disease is caused by the obstruction of cerebrospinal fluid (CSF), in the nervous system.  A situation of high pressure in the spinal cord compared to low pressure outside, leads to fluid accumulation, which eventually forms cavities.  CM is a condition characterized by the mismatch of size between the brain and the skull.  The skull is too small causing part of the brain to descend out of the skull through the opening at its base, crowding the spinal cord.  The cause of CM is not yet fully understood.  CM is rare in most breeds but reportedly has become very widespread in the Cavalier King Charles Spaniel and the Griffon Bruxellois (Brussels Griffon).  Some researchers estimate that as many as 95% of CKCSs may have CM.  It is worldwide in scope and not limited to any country, breeding line, or kennel, and experts report that it is believed to be inherited in the Cavalier King Charles Spaniel.  CM is so widespread in the Cavalier that it may be an inherent part of the CKCS's breed standard.  This disease not only affects thousands of dogs, but a similar condition affects over three hundred thousand children yearly.  Therefore, canines are an appropriate model for the treatment of the human condition. <SEP>  It is from Friesland and in particular from the Frisian forest area, a region in the southeast and east of Friesland. The Stabyhoun or Stabij is one of the top five rarest dog breeds in the world.  The breed has been mentioned in Dutch literature going back to the early 1800s, but has only extended its range from the 1960s outside of Friesland and not until the 2000s did the range officially extend beyond the Netherlands.  The name Stabij translates roughly as "stand by me" with the last part simply Frisian, meaning dog, which is pronounced "hoon".  The dog is considered a Dutch national treasure.  There are only a few thousand Stabyhouns in existence today worldwide. <SEP> The Griffon Bruxellois or Brussels Griffon is a breed of toy dog, named for their city of origin: Brussels, Belgium.  The Griffon Bruxellois may refer to three different breeds, the Griffon Bruxellois, the Griffon Belge and the Petit Brabançon.  Identical in standard except for coat and colour differences, in some standards they are considered varieties of the same breed, much like Belgian Shepherd Dogs.