Question: Kooikers appeared in the paintings of a Dutch painter whose works are known for their abundance of what?

full_context: Document 1: Gerard van Honthorst: Gerard van Honthorst ("Gerrit van Honthorst") (4 November 1592 – 27 April 1656) was a Dutch Golden Age painter who became especially noted for his depiction of artificially lit scenes, eventually receiving the nickname Gherardo delle Notti ("Gerard of the nights"). Early in his career he visited Rome, where he had great success painting in a style influenced by Caravaggio. Following his return to the Netherlands he became a leading portrait painter.
Document 2: American Cocker Spaniel: The American Cocker Spaniel is a breed of sporting dog. It is a spaniel type dog that is closely related to the English Cocker Spaniel; the two breeds diverged during the 20th century due to differing breed standards in America and the UK. In the United States, the breed is usually called the Cocker Spaniel, while elsewhere in the world, it is called the American Cocker Spaniel in order to differentiate between it and its English cousin, which was already known as "Cocker Spaniel" before the American variety was created. The word "cocker" is commonly held to stem from their use to hunt woodcock in England, while "spaniel" is thought to be derived from the type's origins in Spain.
Document 3: Jan van der Vaardt: Jan van der Vaardt (name variations: Jan van der Vaart, John Van der Vaart, John Vander Vaart, Jan van der Waart) (c.1650 –1727) was a Dutch painter of portraits, landscapes and trompe-l'œil paintings and a mezzotint artist who was active in England for most of his career.
Document 4: Kooikerhondje: The Kooikerhondje (literal English translation "little cager dog" or "little caging dog") is a small spaniel-type breed of dog of Dutch ancestry that was originally used as a working dog, particularly in an "eendenkooi" (duck cage) to lure ducks. Kooikers were popular in the 17th and 18th century and appeared in the paintings of Rembrandt and Jan Steen. The breed is rapidly gaining popularity in the United States, Canada and Scandinavia, where it is still relatively unknown.
Document 5: Jan van Steffeswert: Jan van Steffeswert or alternatively Jan van Steffenswert or Jan van Stevensweert (born c. 1460 - died c. 1531) was a Flemish sculptor and woodcarver based in Maastricht. Contrary to the customs of the time, he signed almost all the works he produced using variously Jan Bieldesnider, Jan van Weerd or Jan van Steffeswert. To date, fourteen works have been positively identified as his..
Document 6: Spaniel: A spaniel is a type of gun dog. Spaniels were especially bred to flush game out of denser brush. By the late 17th century spaniels had been specialized into water and land breeds. The extinct English Water Spaniel was used to retrieve water fowl shot down with arrows. Land spaniels were setting spaniels—those that crept forward and pointed their game, allowing hunters to ensnare them with nets, and springing spaniels—those that sprang pheasants and partridges for hunting with falcons, and rabbits for hunting with greyhounds. During the 17th century, the role of the spaniel dramatically changed as Englishmen began hunting with flintlocks for wing shooting. Charles Goodall and Julia Gasow (1984) write that spaniels were "transformed from untrained, wild beaters, to smooth, polished gun dogs."
Document 7: Jan Miense Molenaer: Jan Miense Molenaer (1610 – buried 19 September 1668), was a Dutch Golden Age genre painter whose style was a precursor to Jan Steen's work during Dutch Golden Age painting. He shared a studio with his wife, Judith Leyster, also a genre painter, as well as a portraitist and painter of still-life. Both Molenaer and Leyster may have been pupils of the successful Dutch painter, Frans Hals.
Document 8: Jacob van Ruisdael: Jacob Isaackszoon van Ruisdael (] ;  1629 – 10 March 1682) was a Dutch painter, draughtsman, and etcher. He is generally considered the pre-eminent landscape painter of the Dutch Golden Age, a period of great wealth and cultural achievement when Dutch painting became highly popular.
Document 9: Schipperke: A Schipperke ( ; ] ) is a small Belgian breed of dog that originated in the early 16th century. There has been a long informal debate over whether this type of dog is a spitz or miniature sheepdog. In their home country of Belgium they are considered a small shepherd.
Document 10: Drentse Patrijshond: The Drentsche Patrijshond is a versatile spaniel-type hunting dog from the Dutch province of Drenthe. Called the Dutch Partridge Dog (or "Drent" for Drenthe) in English, approximately 5,000 dogs are registered with the breed club in the Netherlands, and breed clubs operate in Belgium, Denmark, Scandinavia and North America. The Drentsche Patrijshond bears some resemblance to both spaniel and setter types of dog. An excellent pointer and retriever, this dog is often used to hunt fowl and adapts equally well to the field or marshes.
Document 11: Keeshond: The Keeshond ( ; plural: Keeshonden) is a medium-sized dog with a plush, two-layer coat of silver and black fur with a ruff and a curled tail. It originated in Germany, and its closest relatives are the German spitzes such as the Großspitz, Mittelspitz, and Kleinspitz or Pomeranian. Originally called the German Spitz, more specifically the Wolfspitz, the name was officially changed to Keeshond, in 1926 in England, where it had been known as the Dutch Barge Dog.
Document 12: Boykin Spaniel: The Boykin Spaniel is a medium-sized breed of dog, a Spaniel bred for hunting wild turkeys and ducks in the Wateree River Swamp of South Carolina, in the United States. It is the state dog of South Carolina, where it was discovered and further developed by hunters in the 1900s. 1 September is Boykin Spaniel Day in South Carolina.
Document 13: Pieter Nason: Pieter Nason (ca. 1612, Amsterdam - 1688/90 The Hague) was a Dutch painter. He became a member of the Guild of Painters of The Hague in 1639, and in 1656 was one of the forty seven members who established the 'Pictura Society. From a MS. by Pieter Terwesten, it appears not improbable that Nason was a pupil of Jan van Ravensteyn; and it is believed that his name has been effaced from pictures since attributed to Mierevelt, Moreelse, and above all to Ravensteyn. It is certain that he painted the portrait of Prince Mauritz, Governor of the Brazils , engraved by Houbraken, and those of Charles the Second of England, engraved by C. Van Dalen and Sandrart, and of the Grand Elector. At Berlin there is a full-length portrait, dated 1667, of the latter, by Nason; also a still life, representing gold, silver, and glass vessels, likewise a portrait by him signed and dated 1670. There are others at Copenhagen and at Rotterdam. The date of his death is not known, but his life was long. Redgrave gives the initial of his Christian name wrongly as R.
Document 14: Jan Steen: Jan Havickszoon Steen (c. 1626 – buried 3 February 1679) was a Dutch genre painter of the 17th century (also known as the Dutch Golden Age). His works are known for their psychological insight, sense of humour and abundance of colour.
Document 15: Cocker Spaniel: Cocker Spaniels are dogs belonging to two breeds of the spaniel dog type: the American Cocker Spaniel and the English Cocker Spaniel, both of which are commonly called simply "Cocker Spaniel" in their countries of origin. In the early 20th century, Cocker Spaniels also included small hunting Spaniels.
ground_truth: colour