Question: Which breed of dog was bred to be a particularly small size, the Miniature Shar Pei or the English Springer Spaniel?
Context: The Welsh Springer Spaniel is a breed of dog and a member of the spaniel family.  Thought to be comparable to the old Land Spaniel, they are similar to the English Springer Spaniel and historically have been referred to as both the Welsh Spaniel and the Welsh Cocker Spaniel.  They were relatively unknown until a succession of victories in dog trials by the breed increased its popularity.  Following recognition by The Kennel Club in 1902, the breed gained the modern name of Welsh Springer Spaniel.  The breed's coat only comes in a single colour combination of white with red markings, usually in a piebald pattern.  Loyal and affectionate, they can become very attached to family members and are wary of strangers.  Health conditions are limited to those common among many breeds of dog, although they are affected more than average by hip dysplasia and some eye conditions.  They are a working dog, bred for hunting, and while not as rare as some varieties of spaniel, they are rarer than the more widely known English Springer Spaniel with which they are sometimes confused. The English Cocker Spaniel is a breed of gun dog.  The English Cocker Spaniel is an active, good-natured, sporting dog standing well up at the withers and compactly built.  There are "field" or "working" cockers and "show" cockers.  It is one of several varieties of spaniel and somewhat resembles its American cousin, the American Cocker Spaniel, although it is closer to the working-dog form of the Field Spaniel and the English Springer Spaniel. Shar Pei fever (also called familial Shar Pei fever or FSF) is a condition seen in Shar Pei characterized by recurring fever and swelling of the hocks.  It is similar to familial Mediterranean fever in humans.  The cause is unknown, but it is thought to be inherited.  Shar Pei fever can result in renal and liver failure through accumulation of amyloid in those organs (amyloidosis). 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. The Miniature Shar Pei or Mini Pei is a breed of dog with slightly smaller proportions than the larger Standard Shar Pei.  They have been bred to be smaller in size through a recessive gene carried in their DNA.  The reduced size of this breed creates a versatile dog that is unique yet small, making for a good family companion. 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 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. Bone-mouth or Guzui (骨嘴, pinyin: "gǔ zuǐ"), literally means Bony Snout in Mandarin Chinese, is the original type of the Shar Pei dog breed.  There are two varieties in Shar-Pei: a traditional type with fewer wrinkles, roof-tile muzzle, pointed tail, short hair (sandpaper coat), and a modified heavier muzzle (hippopotamus look) with meat padding on top and longer hair (brush coat).  Breeders in China (particularly in Southern China, Hong Kong, Macau) commonly called the traditional type found originally in Dali (Dailek, Dailet), Namhoi City in Guangdong Province as the Bone-mouth (Bony-snout) because of its dry type of muzzle, and the latter development in the Western world as the Meat-mouth (Meaty-snout) because of its meaty type of muzzle with loose skin.  Sharpei Club Hong Kong based its breed standard on the traditional bone-mouth standard.  This Bone-mouth wiki refers to the standard of Sharpei Club Hong Kong, formerly known as F.C.I. standard 309/1994. The Chinese Shar-Pei, is a breed of dog known for its distinctive features of deep wrinkles and a blue-black tongue.  The breed originates from Canton, China.  The English name (沙皮, pinyin: "shā pí"; probably derived from British spelling of the Cantonese equivalent, "sā pèih") translates to "sand skin" and refers to the texture of its short, rough coat.  As puppies, Shar Pei have numerous wrinkles, but as they mature, these loosen and spread out as they "grow into their skin".  Shar Pei were named in 1978 as one of the world's rarest dog breeds by "TIME" magazine and the "Guinness World Records".  Although the Shar Pei has been identified as a basal breed that predates the emergence of the modern breeds in the 19th century, the American Kennel Club did not recognize it as a breed until 1992. Ch.  Felicity's Diamond Jim, CD, RE (June 8, 2000 – May 6, 2011), commonly known as James, was an English Springer Spaniel, best known for being the 2007 Best In Show winner at the Westminster Dog Show.  It was his 51st Best in Show victory, and his last, as his owners chose to retire James after the win to focus him on his work as a certified therapy dog.  He was handled exclusively by the same handler who took Ch.  Salilyn 'N Erin's Shameless to a best-in-show at Westminster in 2000.  In retirement he was recognised in 2008 by the English Springer Spaniel Field Trial Association for his work as a sire and has produced many champion offspring, including Ch.  Cerise Jesse James.
Answer: Miniature Shar Pei