Question: Which breed has been used as a royal guard dog, Kuvasz or Cavalier King Charles Spaniel?

 Mention of the breed can be found in old Hungarian texts.  It has historically been used as a royal guard dog, or to guard livestock, but has been increasingly found in homes as a pet over the last seventy years. The Kuvasz (] ), is an ancient breed of a livestock dog of Hungarian origin. <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> The Cavalier King Charles Spaniel is a small spaniel classed as a toy dog by The Kennel Club and the American Kennel Club.  The breed is generally friendly, affectionate and good with both children and other animals; however, they require a lot of human interaction.  It originated in the United Kingdom and is one of the more popular breeds in many countries.  Since 2000, it has grown in popularity in the United States and ranks as the 18th most popular pure-breed in the United States (2013 Registration Statistics).  It has a silky, smooth coat and commonly a smooth undocked tail.  The breed standard recognizes four colours: Blenheim (chestnut and white), Tricolor (black/white/tan), Black and Tan, and Ruby.  Since they are a family dog, it is recommended to not leave them alone for long periods at a time.  The expected average lifespan of a Cavalier King Charles Spaniel is under ten years. <SEP> The Toy Trawler Spaniel is an extinct breed of Spaniel which physically was similar to the King Charles Spaniel of the 16th century.  It is considered to have descended from the original King Charles Spaniel, and the older variety of Sussex Spaniel.  It was originally used as a sporting dog, but became used as a toy and show dog.  It was considered to be on the verge of extinction by 1920.  A preserved specimen is kept in Tring at the Natural History Museum.