Question: Which breed was originally developed for hunting and guarding, Field Spaniels or Irish Wolfhounds?
Context: The Norfolk Spaniel or Shropshire Spaniel is an extinct breed of dog since the early 20th century.  It was originally thought to have originated from the work of one of the Dukes of Norfolk, but this theory was disproven after being in doubt during the later part of the 19th century.  The term was used to designate springer type spaniels that were neither Sussex nor Clumber Spaniels, and attempts were made to use it to specify a breed that would later become known as the English Springer Spaniel. Dansk-svensk gårdshund (Danish–Swedish Farmdog) is a Pure breed of dog that has its origin in Denmark and southern Sweden, but now has become popular all over Scandinavia.  DSF is an old native breed which historically lived on farms in the eastern part of Denmark and southernmost part of Sweden (i.e. on both sides of The Sound, the narrow strait that separates the Danish island of Zealand from the southern tip of the Scandinavian peninsula), serving as a farmdog, guarding their people, farmed animals and the farm itself from strangers and intruders, catching rats and as a hunting dog.  There are some indications that the breed originates from the Pinscher breeds and the British white hunting terriers. DSF has a soft and gentle temperament, but still has the strength to guard its family. The English Springer Spaniel is a breed of gun dog in the Spaniel family traditionally used for flushing and retrieving game.  It is an affectionate, excitable breed with a typical lifespan of twelve to fourteen years.  They are very similar to the Welsh Springer Spaniel and are descended from the Norfolk or Shropshire Spaniels of the mid-19th century; the breed has diverged into separate show and working lines.  The breed suffers from average health complaints.  The show-bred version of the breed has been linked to "rage syndrome", although the disorder is very rare.  It is closely related to the Welsh Springer Spaniel and very closely to the English Cocker Spaniel; less than a century ago, springers and cockers would come from the same litter.  The smaller "cockers" hunted woodcock while the larger littermates were used to flush, or "spring," game.  In 1902, The Kennel Club recognized the English Springer Spaniel as a distinct breed.  They are used as sniffer dogs on a widespread basis.  The term "Springer" comes from the historic hunting role, where the dog would flush (spring) birds into the air. The Clumber Spaniel is a breed of dog of the spaniel type, developed in the United Kingdom.  It is the largest of the spaniels, and comes in predominantly white with either lemon or orange markings, but can sometimes be either brown or lemon predominantly.  The name of the breed is taken from Clumber Park in Nottinghamshire where the breed was first developed.  It is a gundog that specialises in hunting in heavy cover.  They are gentle and loyal, and can act aloof with strangers.  They have several habits which could be considered disadvantages, including a constant shedding of its coat and snoring. The American Water Spaniel, (often abbreviated to AWS), is a breed of spaniel which originated in the United States.  Developed in the state of Wisconsin during the 19th century from a number of other breeds, including the Irish and English Water Spaniels.  The breed was saved by Dr. Fred J. Pfeifer, who set up the breed club and standard, and whose work led to recognition for the breed by the United Kennel Club, and later, the American Kennel Club.  While they are the state dog of Wisconsin, they remain a rare breed. Phyllis Gardner (6 October 1890 – 16 February 1939) was a writer, artist, and noted breeder of Irish Wolfhounds.  Her and Rupert Brooke had, on her side at least, a passionate relationship.  She attended the Slade School of Fine Art and was a suffragette when they met.  Their conflicting politics, and his conflicted feelings, led the relationship to end. The Boston Irish Wolfhounds Rugby Football Club (also known as BIWRFC) is a rugby union team based in Boston, Massachusetts, US.  The club competes in, and is governed by, the New England Rugby Football Union (their LAU), the Northeast Rugby Union (their TAU), and USA Rugby.  In 2014 it joined the American Rugby Premiership. The Irish Wolfhound (Irish: "Cú Faoil" , ] ) is a breed of domestic dog ("Canis lupus familiaris"), specifically a very large sighthound from Ireland.  The name originates from its purposewolf hunting with dogsrather than from its appearance.  Originally developed from war hounds to one used for hunting and guarding, Irish Wolfhounds can be an imposing sight due to their formidable size. The Russian Spaniel is a type of spaniel first standardised in 1951 in the Soviet Union after World War II by cross breeding English Cocker Spaniels, English Springer Spaniels and other spaniel breeds.  Physically it is similar to a Cocker Spaniel, but has a shorter, tighter coat and a longer body.  Developed and used as hunting dogs, this breed does not suffer from any major health complaints other than those normally associated with spaniels.  Popular in its native Russia, the breed was only introduced overseas in the 1990s, and is not yet recognised by any major kennel clubs. The Field Spaniel is a medium-sized breed dog of the spaniel type.  They were originally developed to be all-black show dogs in the late 19th and early 20th centuries and were unpopular for work as a hunting dog.  However, during the mid-20th century they were redeveloped as a longer-legged dog that was more suitable to be used for field work.  They are now considered to be a rare breed, and are registered as a Vulnerable Native Breed by The Kennel Club.
Answer: Irish Wolfhounds