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20-1113: Silken Windhounds are graceful, small- to medium-sized sighthounds with silky coats of middling length. Silken coat colors can range from white to black, with brilliant brindles and solid red in between. They can be spotted, tuxedo-marked or solid-colored. Silken Windhounds are affectionate and playful, and are good dogs for families with children. Due to their friendliness, they are not good guard dogs but are easily housebroken and can be trained to live with smaller household pets. Silkens particularly like agility , therapy , flyball , and obedience . Silken Windhounds are intelligent and easily trained using rewards and affection in short, positive sessions. They will work eagerly and form strong relationships with their owners if treated well. Like many sighthounds , Silken Windhounds can slip out of buckle collars , so most owners favor semi-slip collars . Silken Windhounds typically live into their middle to late teens. Bone and joint ailments like hip dysplasia and bloat are rare. Some individual Silken Windhounds are sensitive to ivermectin and related drugs;

40-406: A type of hound dog that hunts primarily by sight and speed, unlike scent hounds , which rely on scent and endurance. These dogs specialize in pursuing prey, keeping it in sight, and overpowering it by their great speed and agility. They must be able to detect motion quickly, so they have keen vision. Sighthounds must be able to capture fast, agile prey, such as deer and hares , so they have

60-712: A Limited Stakes breed in the ASFA . Over forty dogs competed in ASFA limited stakes in their first month of acceptance. In late 2010, Silken Windhounds were accepted as a breed in NOFCA, the National Open Field Coursing Association, and can participate in open field events. On March 18, 2011, Silken Windhounds were accepted into the United Kennel Club. Sighthounds Sighthounds (also called gazehounds ) are

80-467: A Saluki, appearing in the excavations of Tell Brak dated approximately 4,000 years before present. The earliest complete European description of a sighthound and its work, the Celtic vertragus from Roman Spain of the 2nd century C.E., comes from Arrian 's Cynegeticus . A similar type, possibly a moderately sized male sighthound, with a height of 61–63 cm, of approximately the same historic period,

100-847: A fuel in the absence of oxygen, or more specifically, when ATP is needed at rates that exceed those provided by aerobic metabolism . The consequence of such rapid glucose breakdown is the formation of lactic acid (or more appropriately, its conjugate base lactate at biological pH levels). Physical activities that last up to about thirty seconds rely primarily on the former ATP-CP phosphagen system . Beyond this time, both aerobic and anaerobic glycolysis-based metabolic systems are used. The by-product of anaerobic glycolysis —lactate—has traditionally been thought to be detrimental to muscle function. However, this appears likely only when lactate levels are very high. Elevated lactate levels are only one of many changes that occur within and around muscle cells during intense exercise that can lead to fatigue. Fatigue, which

120-545: A higher number of retinal ganglion cells in their “visual streak”, retain more heightened sensitivity than other dog types to objects and rapid movement in the horizontal field of vision. Sighthounds such as the Saluki/Sloughi type (both named after the Seleucid Empire ) may have existed for at least 5,000 years, with the earliest presumed sighthound remains of a male with a shoulder height around 54 cm, compared to

140-431: A light, lean head, which is dolichocephalic in proportion. This shape can create the illusion that their heads are longer than usual. Wolves and other wild dogs are dolichocephalic or mesaticephalic , but some domestic dogs have become brachycephalic (short-headed) due to artificial selection by humans over the course of 12,000 years. Dolichocephalic dogs have a wider field of vision but smaller overlap between

160-556: A simple test is now available to find whether a dog carries a defective MDR1 , a multi-drug resistance gene. Some owners report cases of cryptorchidism , umbilical hernia , and lotus syndrome , plus deafness and cataracts in old age. Silken Windhounds were founded and developed in Austin, Texas , by Francie Stull, a successful breeder of show and performance American Kennel Club Borzoi and Deerhounds , using her favored Borzoi and Lurcher bloodlines. The first Silken Windhound litter

180-628: A very flexible back and long legs for a long stride, a deep chest to support an unusually (compared to other dogs) large heart, very efficient lungs for both anaerobic and aerobic sprints, and a lean, wiry body to keep their weight at a minimum. Sighthounds have unique anatomical and physiological features, likely due to intentional selection for hunting by speed and sight; laboratory studies have established reference intervals for hematology and serum biochemical profiles in sighthounds, some of which are shared by all sighthounds and some of which may be unique to one breed. The typical sighthound type has

200-455: Is a natural part of metabolic energy expenditure. Fast twitch muscles (as compared to slow twitch muscles ) operate using anaerobic metabolic systems, such that any use of fast twitch muscle fibers leads to increased anaerobic energy expenditure. Intense exercise lasting upwards of four minutes (e.g. a mile race) may still have considerable anaerobic energy expenditure. An example is high-intensity interval training , an exercise strategy that

220-554: Is performed under anaerobic conditions at intensities that reach an excess of 90% of the maximum heart rate . Anaerobic energy expenditure is difficult to accurately quantify. Some methods estimate the anaerobic component of an exercise by determining the maximum accumulated oxygen deficit or measuring the lactic acid formation in muscle mass. In contrast, aerobic exercise includes lower intensity activities performed for longer periods of time. Activities such as walking , jogging , rowing , and cycling require oxygen to generate

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240-614: The American Kennel Club and The Kennel Club ( UK ), group pedigree sighthound breeds together with scent hounds in a Hound Group, the Fédération Cynologique Internationale groups them in a dedicated Sighthound Group, whilst the United Kennel Club groups them in a Sighthound and Pariah Group. Anaerobic exercise Anaerobic exercise is a type of exercise that breaks down glucose in

260-542: The Warmington Roman dog is described from a well-preserved skeleton found in England. Sighthound type "gracile" bones, dating from the 8th to 9th century CE, anatomically defined as those of a 70 cm (28 in) high "greyhound", were genetically compared with the modern Greyhound and other sighthounds and found to be almost identical with the modern Greyhound breed, with the exception of only four deletions and one substitution in

280-725: The DNA sequences, which were interpreted as differences probably arising from 11 centuries of breeding of this type of sighthound. Population genomic analysis proposes that true sighthounds originated independently from native dogs and were comprehensively admixed among breeds, supporting the multiple origins hypothesis of sighthounds. Although today most sighthounds are kept primarily as pets , some of them may have been bred for as many as thousands of years to detect movement of prey, then chase, capture, and kill it primarily by speed. They thrive on physical activity. Some have mellow personalities, others are watchful or even hostile towards strangers, but

300-736: The NAKC, IABCA, and NCA, as part of the hound group. In Slovenia , Silkens are an accepted part of the Slovenian Kennel Club, member of the FCI , also in the hound group. Silken Windhounds also participate in sighthound performance sports, competing alongside other sighthounds in Finnish lure coursing and straight racing events. The ISWS has established straight and oval track racing programs that enable Silkens to compete and win points towards performance titles. In late 2009, Silken Windhounds were accepted as

320-561: The body without using oxygen; anaerobic means "without oxygen". This type of exercise leads to a buildup of lactic acid . In practical terms, this means that anaerobic exercise is more intense, but shorter in duration than aerobic exercise . The biochemistry of anaerobic exercise involves a process called glycolysis , in which glucose is converted to adenosine triphosphate (ATP), the primary source of energy for cellular reactions. Anaerobic exercise may be used to help build endurance, muscle strength, and power. Anaerobic metabolism

340-693: The energy needed for prolonged exercise (i.e., aerobic energy expenditure). For sports that require repeated short bursts of exercise, the aerobic system acts to replenish and store energy during recovery periods to fuel the next energy burst. Therefore, training strategies for many sports demand that both aerobic and anaerobic systems be developed. The benefits of adding anaerobic exercise include improving cardiovascular endurance as well as build and maintaining muscle strength and losing weight. The anaerobic energy systems are: High energy phosphates are stored in limited quantities within muscle cells. Anaerobic glycolysis exclusively uses glucose (and glycogen ) as

360-406: The eyes and therefore possibly poorer depth perception in some of their field of view than brachycephalic dogs; most, if not all, dogs have less visual acuity than their antecedent, the wolf. There is no science-based evidence to confirm the popular belief that sighthounds have a higher visual acuity than other types of dogs. However, there is increasing evidence that dolichocephalic dogs, thanks to

380-617: The instinct to chase running animals remains strong. Apart from coursing and hunting , various dog sports are practiced with purebred sighthounds, and sometimes with lurchers and longdogs . Such sports include racing , lure coursing , and other events. A number of breeds or types of dogs which do not hunt solely by speed and sight, as well as a number of non-hunting breeds, are currently being recognized as sighthounds, either formally or informally by kennel clubs, or lure and live coursing clubs. These include: When competing in conformation shows , most Anglophone kennel clubs , including

400-548: Was whelped in 1985 and a breed club , the International Silken Windhound Society, was formed in 1999. In early 2011, Silken Windhounds were recognized by the United Kennel Club . Silkens are now in 24 countries as well. The Silken Windhound studbooks closed in 2000, with minimal sanctioned outcrossing to foundational breeds being monitored to improve health and lower COI. Silken Windhounds participate in performance sports and showings worldwide, including

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