Question: Which is bigger, Griffon Bruxellois or English Mastiff?

 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. The Griffon Bruxellois or Brussels Griffon is a breed of toy dog, named for their city of origin: Brussels, Belgium. <SEP> The Hinterrhein (German; Romansh: "Rein Posteriur" ; English: Posterior Rhine ) is one of the two initial tributaries of the Rhine (less in length but bigger by volume) in the canton of Graubünden in Switzerland, flowing from the village Hinterrhein near the San Bernardino Pass through the Rheinwald valley into a gorge called Roflaschlucht.  In this gorge an equally sized tributary, the Avers Rhine, adds waters from the deep Val Ferrera and the very remote alp Avers and its side valley "Valle di Lei" on Italian territory.  After the Rofla Gorge, the valley widens into a section called Schams.  The Hinterrhein then reaches Andeer, before passing through another gorge, Viamala just before Thusis.  Now another tributary of slightly bigger volume reaches the Hinterrhein as the Landwasser, draining a system of valleys, which is commonly known as Davos joins via the Albula coming from the Albula Pass, which is also the name of a railway line that has become a UNESCO world heritage.  Another big tributary of Albula river is Gelgia from the Julier pass area.  After flowing to Rothenbrunnen through a valley called Domleschg with an incredible number of castles (showing the importance of transit in the area) again the river is left alone from civilisation in the floodplain "Isla Bella" near Rhäzüns, before it joins the Anterior Rhine at Reichenau, all of them also in Graubünden. <SEP>  Distinguishable by enormous size, massive head, and a limited range of colours, but always displaying a black mask, the Mastiff is noted for its gentle and loving nature.  The lineage of modern dogs can be traced back to the early 19th century, but the modern type was stabilised in the 1880s and refined since.  Following a period of sharp decline, the Mastiff has increased its worldwide popularity. The English Mastiff is a breed of extremely large dog (often known simply as the Mastiff) perhaps descended from the ancient Alaunt and Pugnaces Britanniae, with a significant input from the Alpine Mastiff in the 19th century.  Throughout its history, the Mastiff has contributed to the development of a number of dog breeds, some generally known as Mastiff-type dogs, or, confusingly, just as "Mastiffs". <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.