The history of the Cavalier King Charles Spaniel is inextricably woven into the tapestry of British royal history, spanning more than four centuries and involving some of the most dramatic periods in English history. Small toy spaniels have been documented in Britain since at least the 1500s, appearing in paintings, tapestries, and written accounts from Tudor times. These early toy spaniels served multiple purposes for the nobility and wealthy classes: they were companions, lap warmers in cold castles, foot warmers in drafty carriages, and were even believed to attract fleas away from their human companions, potentially protecting against plague and other diseases.
The breed's association with royalty began in earnest during the Stuart dynasty. Mary Queen of Scots was said to own a small toy spaniel that accompanied her even to her execution in 1587, reportedly hiding beneath her skirts. However, it was King Charles II, who reigned from 1660 to 1685, who became the breed's most famous patron and gave them their name. The 'Merry Monarch,' as he was known, was seldom seen without two or three small spaniels at his heels. So devoted was he to his dogs that he was accused of neglecting affairs of state to spend time with them. Charles II allegedly issued a decree that King Charles Spaniels should be admitted to any public place, including the Houses of Parliament where dogs were normally forbidden, though historians debate whether such a decree actually existed as an official document.
During Charles II's reign and for several decades afterward, these toy spaniels had longer muzzles, flatter skulls, and higher-set ears than would later become fashionable. They appeared in numerous paintings by Dutch and English masters, including works by Sir Anthony van Dyck, Sir Peter Lely, and later Sir Edwin Landseer. John Churchill, 1st Duke of Marlborough, bred a famous line of red and white spaniels at Blenheim Palace in the early 1700s, and these dogs were noted for their hunting ability despite their small size, capable of keeping up with horses and flushing woodcock.
The appearance of King Charles Spaniels began to change dramatically in the late 1600s and especially during the 1800s, influenced by the fashionable craze for flat-faced dogs from Asia. When William of Orange took the British throne in 1689 with his wife Mary, they brought with them a preference for Pugs, Japanese Chins, and Pekingese. Over the next two centuries, toy spaniels were increasingly crossed with these brachycephalic breeds, resulting in dogs with progressively shorter muzzles, more domed skulls, lower-set ears, and more prominent eyes. By the late Victorian era, the King Charles Spaniel had been completely transformed into a flat-faced breed bearing little resemblance to the dogs in historical paintings.
Periodically, longer-muzzled puppies would appear in litters as throwbacks to earlier type, but these were generally considered undesirable by breeders who favored the fashionable flat face. Some early 20th-century breeders, including Judith Blunt-Lytton (16th Baroness Wentworth), attempted to recreate the original type using various crosses, including the now-extinct Toy Trawler Spaniel, but these efforts did not gain widespread support.
The turning point came in 1926 when wealthy American philanthropist Roswell Eldridge traveled to England seeking toy spaniels that resembled those in historical paintings. Finding none, he placed an advertisement in the Crufts dog show catalog offering prizes of twenty-five pounds sterling (equivalent to nearly $2,000 today) each year for five years for the best dog and bitch of 'Blenheim Spaniels of the old type, as shown in pictures of Charles II's time, long face, no stop, flat skull, not inclined to be domed, with spot in centre of skull.' The established King Charles Spaniel breeders were largely appalled by Eldridge's challenge, as they had worked for generations to breed away from this old type. However, a few breeders who had been quietly preserving or attempting to recreate the longer-muzzled type saw an opportunity.
Mrs. Hewitt Pitt, a Chow Chow breeder, became one of the pioneers of the revival movement after winning Eldridge's class at Crufts in 1928 with a bitch named Waif Julia. She established the influential Ttiweh kennel (Hewitt spelled backward), and her breeding program became foundational to the modern breed. In 1928, a dog named Ann's Son, owned by Miss Mostyn Walker, was used as the model for the first breed standard when the Cavalier King Charles Spaniel Club was formed that same year. The name 'Cavalier' was chosen to honor the royalist supporters of Charles I and Charles II during the English Civil War period, distinguishing this revived breed from the flat-faced King Charles Spaniel.
Unfortunately, Roswell Eldridge died in 1928, just one month before Crufts, never seeing the full fruition of his challenge. However, the movement he initiated gained momentum through the dedication of a small group of breeders. Progress was slow, and The Kennel Club initially refused to grant separate recognition, believing the numbers were too small and the type insufficiently standardized. The outbreak of World War II nearly destroyed the breed entirely. Many Cavalier kennels were decimated by wartime hardships, food shortages, and the practical impossibility of maintaining breeding programs. The famous Ttiweh kennel saw its population drop from sixty dogs to just three during the war years.
After the war, the breed had to be rebuilt from a very small genetic base – some sources suggest that all modern Cavaliers descend from as few as six foundation dogs that survived the war. Despite this narrow genetic bottleneck, or perhaps because dedicated breeders carefully managed the limited gene pool, the breed gradually gained recognition. In 1945, The Kennel Club finally granted the Cavalier King Charles Spaniel full recognition as a breed separate from the King Charles Spaniel. The breed gained popularity slowly but steadily in Britain, with a major boost coming when a Cavalier won Best in Show at Crufts, bringing significant public attention.
The first Cavaliers arrived in the United States in 1952, brought by W. Lyon Brown, who together with Elizabeth Spalding and other enthusiasts founded the Cavalier King Charles Spaniel Club, USA, which remains active today. For decades, American Cavalier fanciers deliberately kept the breed out of AKC recognition, believing that maintaining a more closed registry would preserve health and temperament. However, in 1994, a group of breeders formed the American Cavalier King Charles Spaniel Club specifically to seek AKC recognition, which was granted in 1995 with full championship status beginning in 1996. This created the unusual situation of having two national breed clubs in the United States, reflecting different philosophies about breed management and kennel club affiliation.
Today, the Cavalier King Charles Spaniel has become one of the most popular toy breeds worldwide, consistently ranking in the top twenty breeds in many countries. The breed has successfully preserved the gentle, affectionate temperament and elegant appearance that endeared their ancestors to royalty centuries ago, while adapting to modern family life. From nearly facing extinction during World War II, the breed has made a remarkable recovery, though this narrow genetic bottleneck has contributed to some of the health challenges the breed faces today, particularly mitral valve disease and syringomyelia.