Australian Shepherd

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Australian Shepherd
Redtriaussie01.jpg
Red Australian Shepherd
Nicknames Aussie or little blue dog
Country of origin United States
Traits
Weight Male 23–29 kg (50–65 lb)
Female 14–20 kg (30–45 lb)
Height Male 51–58 cm (20–23 in)
Female 46–53 cm (18–21 in)[1]
Coat straight and may have curls
Color Tri-colored (black/red), bi-colored (black/red), blue merle/red merle
Litter size 3–10 average 7
Life span 12–18 years
Dog (Canis lupus familiaris)

The Australian Shepherd, commonly known as the Aussie, is a breed of dog that was developed on ranches in the western United States.[2] Despite its name, the breed was not developed in Australia, but rather in the United States where they were seen in the West as early as the 1800s.[3][4][5] The breed rose gradually in popularity with the boom of western riding after World War I. They became known to the general public through rodeos, horse shows, and Disney movies made for television.

For many years, Aussies have been valued by stockmen for their versatility and trainability. They have a similar look to the popular English Shepherd and Border Collie breeds. While they continue to work as stockdogs and compete in herding trials, the breed has earned recognition in other roles due to their trainability and eagerness to please, and are highly regarded for their skills in obedience.[6] Like all working breeds, the Aussie has considerable energy and drive, and usually needs a job to do. It often excels at dog sports such as dog agility, flyball, and frisbee. They are also highly successful search and rescue dogs, disaster dogs, detection dogs, guide, service, and therapy dogs.

Physical traits[edit]

Size[edit]

The Australian shepherd is a medium sized breed of solid build. They can be anywhere from 14–29 kilograms (30–65 lb) and anywhere from 43–66 centimetres (17–26 in) in height. The ASCA standard calls for the Australian shepherd to stand between 46–58 centimetres (18–23 in) at the withers, females being 46–53 centimetres (18–21 in) and males measuring 51–58 centimetres (20–23 in), however, quality is not to be sacrificed in favor of size.[1]

Color[edit]

Variations of Australian Shepherd Colors

Aussie colors are black, red (sometimes called liver), blue merle (marbled black, white and gray), and red merle (marbled red, white and buff),[6] each of these colors may also have copper (tan) points or white markings in various combination on the face, chest, and legs. A black or red dog with copper and white trim is called tricolor or tri, a black or red dog with white trim but no copper is called bicolor or bi. White, rather than pigment, on or around the ears is an indicator of increased risk for white-related deafness. Excessive white on the face and ears can place an individual dog at greater risk for sunburn and subsequent skin cancer.

The wide variation of color combinations comes from the interaction between the a color allele, which is either black (B) dominant or red (b) recessive, and the dominant merle allele (M). Together, these provide four coat-color aspects that can appear in any combination:[7]

  • Black, with tan points, white markings, or both on the face, collar, legs, chest, underbelly. Solid black dogs are equally desirable as ones with tan or white.
  • Red (Liver) with or without tan points or white markings on the face, collar, legs, chest, underbelly. Either white or tan points are required. Solid Red dogs are equally desirable as ones with tan or white.
  • Blue Merle (a mottled patchwork of gray and black) with or without tan points or white markings on the face, collar, legs, chest, underbelly. Neither white nor tan points are required. Solid Merle dogs are equally desirable as ones with tan or white.
  • Red Merle (a mottled patchwork of cream and liver red) with or without tan points or white markings on the face, collar, legs, chest, underbelly. Neither white nor tan points are required. Solid Merle dogs are equally desirable as ones with tan or white.[8]

The merle allele, which produces a mingled or patchwork combination of dark and light areas, is the coat pattern most commonly associated with the breed. This merle (M) is dominant so that heterozygous dogs (Mm) show the pigmentation pattern; however, when two merles are bred, there is a statistical risk that 25% of the offspring will end up with the two copies of the merle gene (homozygous). These dogs usually have a mostly white coat and blue irises, and are often deaf, blind, or both. In this case, the deafness and blindness are linked to having two copies of the merle gene, which disrupts pigmentation and produces these health defects.[9]

All black and blue merle dogs have black noses, eye rims, and lips. All red and red merle dogs have liver or brown noses, eye rims, and lips.

Red merle with copper points and one brown eye and one blue eye. Blue merle with copper points with blue eyes

There is also great variety in the Aussie's eye color. An early nickname for the breed was "ghost-eye dog". Aussie eyes may be any shade of brown, or blue; they may have two different colored eyes, or even have bicolored or "split eyes" (for example, a half-brown, half-blue eye), which appear to be linked to the merle coloration. Merled eyes occur as well, where one color is mixed in and swirled with another. Any combination of eye color is acceptable in the breed standard, so long as the eyes are healthy. In general, however, black Aussies (self, bi-color or tri-color) tend to have brown eyes, while red (self, bi-color or tri-color) Aussies tend to have amber eyes, though these Aussies may also carry the blue-eyed gene. These dogs are also brown in color.

Tail[edit]

A hallmark of the breed, some Aussies are born with naturally bobbed tails (NBT). Others have full long tails, and others with natural partial bobs, where the tail is midlength and appears stubby. Breeders have historically docked the tails when the puppies are born. Even without a tail, the wagging movement still occurs as the dog wiggles or shakes their hind end. In the United States and Canada the standard calls for a natural bob or docked tail not to exceed four inches as a defining characteristic, however some long tailed examples have been successfully shown and been given recognition despite having a longer tail. Any natural tail length is permitted when showing in Europe, where docking has been banned in some countries.

Temperament[edit]

Blue merle and bi-color black/white Aussies running

The breed is typically highly energetic, requiring a great deal of exercise and attention,[6] although some can be calm and easy-going. An Australian shepherd enjoys working, whether it is learning and practicing tricks, competing in dog agility, or engaging in any other physically and mentally involving activity.[10]

Dogs may show reserved and cautious guarding behaviors. They are kind, loving, and devoted to those they know. They are very loyal to their owners, and are rewarding dogs if treated well.[10] Because the breed was developed to serve on the ranch, a job which includes being protective of its property, it is inclined to bark warnings about neighborhood activity. It is not inclined toward obsessive barking.

The Aussie is intelligent, learns quickly, and loves to play.[11] This means that a bored, neglected, unexercised Aussie may invent its own games, activities, and jobs, which to a busy owner might appear to be hyperactivity: for example, an Aussie may go from being at rest to running at top speed for several "laps" around the house before returning to rest. Without something to amuse them, Aussies can become destructive. Aussies also do best with plenty of human companionship: they are often called "Velcro Dogs" for their strong desire to always be near their owners and for their tendency to form intense, devoted bonds with select people.[10]

The Australian shepherd has a reputation as a highly intelligent and versatile stock dog with a range of working styles.[12] A good working Aussie is quick, thoughtful, and easy with its stock. The ability for the breed to adapt to the situation and think for itself makes it an excellent all-around worker. For this reason the Aussie is often chosen to work unusual livestock such as ducks, geese, and commercially raised rabbits.

Australian shepherds can become extremely destructive if their energy is not directed in a positive way. These dogs require a minimum of 2–3 hours a day of play, exercise, and attention. They thrive in rural, ranch like conditions, and need space to run and play in an urban setting. The Australian shepherd is a high-spirited dog, that requires much attention and work. Teaching them tricks keeps them focused and happy, which also keeps their minds working. The breed also has great stamina and can live in a variety of terrain. That's why they are a popular pick as trail dogs and working dogs.[11]

Health[edit]

There are several health problems that an Australian shepherd can have. Vision problems are common.[13] Epilepsy is also a concern. In merle to merle breeding, the puppies who have inherited two copies of the merle gene have an increased risk of being born blind, and/or deaf.[14]

Mortality[edit]

Results of a 1998 internet survey with a sample size of 614 Australian shepherds indicated a median longevity of about 12.5 years, but that longevity may be declining.[15] A 2004 UK survey found a much shorter median longevity of 9 years, but their sample size was low (22 deceased dogs).[16]

The median life spans for breeds similar in size to Australian shepherds are mostly between 11 and 13 years,[17] so, assuming the results of the UK study are not representative of the population there, Aussies appear to have a typical life span for a breed their size. Leading causes of death in the UK survey were cancer (32%), "combinations" (18%), and old age (14%).

Morbidity[edit]

Based on a sample of 48 still-living dogs, the most common health issues noted by owners were eye problems (red eye, epiphora, conjunctivitis, and cataracts).[16] Dermatological and respiratory problems also ranked high.

Collie eye anomaly (CEA) is rare in the breed, but it and cataracts are a concern[18] in Aussies. Other conditions to note include iris coloboma, canine hip dysplasia (CHD), Pelger-Huet anomaly, hypothyroidism, and nasal solar dermatitis. Prior to breeding, the Aussie should be checked for Hip and Elbow Dysplasia, DNA tests performed to show the dog to be free of the MDR1 mutation, cataract mutation, and CEA. Tests should also include those for thyroidism and clearances for other known eye diseases like colobomas, PRA and retinal folds.

Some Australian shepherds (as well as collies, German shepherds and many other herding dogs) are susceptible to a genetic mutation of the MDR1 gene.[19] Dogs with the mutation can suffer toxicity from anti-parasitics such as Ivermectin in high doses, and other drugs.[20] A test is available to determine if a particular dog carries the mutated gene.[21]

Double merle[edit]

An example of an abnormal eye of a double merle, aka "lethal white", Australian Shepherd. The abnormally small left eye is known as microphthalmia, and the pupil shows signs of subluxation which is dropped, not centered.

Double merling or homozygous merle occurs when the resulting offspring of two merled parents inherit two copies of the dominant merle gene. The odds of this are 25% for each pup born from such a litter.[9] Double merles often have excessive white and can have hearing and vision problems as a result of having two copies of the merle gene. Homozygous merles can be deaf or blind, or express iris colobomas and microphthalmia. Not all homozygous merles are affected, but most are, making the breeding of two merles a very touchy subject. Some breeders euthanize mostly white pups while others may attempt to sell them as "rare" white Aussies without disclosing the potential for health defects.[22] A large percentage of homozygous merles sold eventually end up in rescue and shelters as the average family is ill prepared to take on a deaf or blind pet. However, deaf or blind Australian shepherds can make wonderful pets given a home prepared for their special needs. They are an intelligent breed, who generally learn hand signals with ease. The term "lethal white" originated from horses born with "lethal white syndrome", and has since evolved to often describe dogs born with the double merle trait. This trait is found in many breeds, but most commonly found in Australian Shepherds. The name "lethal white" is a misnomer, as this genetic condition is not lethal to the dogs; it is often the breeder who is lethal to the pups by culling them immediately after birth.[23] Many consider the term "lethal white" to be derogatory.[24]

Available health tests[edit]

Many diagnostic tests are available for concerned Aussie owners to check the overall health of an Aussie. Also, the Orthopedic Foundation for Animals (OFA) has an extensive database to track results and provide statistics for the following concerns: hips, elbows, heart, patellar luxation (knees), and thyroid (autoimmune) disease. The OFA database also includes the results for eye exams performed by a Canine Eye Registration Foundation (CERF) veterinarian, but only if the owner of the Aussie submits the results. This database is a great resource to investigate the lineage and related health of the progenitors of some dogs, at least regarding hip ratings.

Many tests have been developed by, or are processed at, laboratories to check for the 11 health concerns that plague the Australian shepherd breed. Some of those labs are Optigen, Animal Health Trust, Endocrine Diagnostic Center, Animal Health Laboratory, Washington State University Veterinary Clinic, Vet DNA Center, and HealthGene. These labs might perform one or many of the tests that have been developed.

Tests or evaluations have been developed for:

  • Hip and Elbow Dysplasia
  • Patellar Luxation (knees)
  • Eyes
  • Collie Eye Anomaly (CEA)
  • Progressive Retinal Atrophy (PRA)
  • Thyroid (Autoimmune) – Multiple labs perform this test-check OFA application for list
  • Congenital Cardiac (heart)
  • Multi Drug Resistance Gene (MDR1)
  • Hereditary Cataracts (HSF4)
  • Pelger Huet Anomaly

Other areas that are currently not health concerns, but tests have been developed for, are:

  • Coat Color (red carrier/red factored) – Vet DNA Center and HealthGene process this sample
  • Dilute Gene Carrier – Vet DNA Center and HealthGene process this sample

DNA testing to either certify parentage (CP) or to verify parentage (VP) for Australian shepherds is also another test that can be performed and as of January 2010 all adults producing a litter will be required to be DNA tested to allow a breeder to register a litter with the Australian Shepherd Club of America (ASCA).

There is a list of costs, labs, applications, and samples required for the above tests at Pure Stock Aussies

History[edit]

The Australian Shepherd's history is vague, as is the reason for its misleading name. It is believed by some that the breed has Basque origins in Spain and was used there by shepherds.[6] Those shepherds might, then, have emigrated to the West Coast of the United States via Australia.[25][26] However, scientific evidence has shown that the breed has lineage from American dogs that originally came over the Bering Land Bridge.[27] What is known is that it developed in western North America in the 19th and early 20th centuries.

An Australian shepherd from working lines; early breeders chose dogs for their abilities rather than conformation.

The Australian Shepherd was a particularly tireless sheep herder in the Rocky Mountains because it is relatively unaffected by altitude. Ranchers in Boulder, Colorado, began breeding the dogs, which would attract purchasers from as far west as California for their legendary sheep herding abilities.

Breeds as we know them today did not exist before Victorian times, but local variations of the ancestors of current breeds came into America along with their owners and livestock. Included are some that are now extinct or that have merged into other breeds. These may have included some British herding dogs, native dogs from North America (originating in Asia/Siberia) as well as dogs from Germany, Spain including the Carea Leonés.[28] For many centuries, shepherds were more interested in dogs' working abilities than their appearance. As a result, over time, shepherds interbred dogs that they believed would produce better workers for the given climate and landscape. In the eastern U.S., terrain and weather conditions were similar to that of Europe, however, so the existing imported breeds and their offspring worked well there.[7]

In the American West, conditions were quite different. Spanish flocks were introduced for food and fiber which was mainly the Churra. The Spanish dogs that accompanied them to American West proved well suited for their job in the wild and dangerous territory. They were highly valued for their ability to herd and protect their charges from predators on the open range.[29] In the arid and semiarid areas inhabited by early Spanish settlers, temperatures reached extremes of hot and cold, and fields varied in altitude from sea level to the higher, rougher Sierra Nevada and similar mountain ranges.[7] The ranchers in these areas often pastured livestock on remote ranges. They preferred more aggressive herding dogs that served in the capacity of herder and guardian.[30]

With the 1849 California Gold Rush, a massive migration occurred to the west coast. The Gold Rush and the Civil War brought great demand for mutton and wool.[31] Along with easterners came flocks of sheep and their eastern herding dogs; from the southwest came people and sheep. But it was just as effective to bring sheep in by ship, and in they came, including flocks from Australia and other regions, along with shepherds and their own herding breeds.[7]

It is not clear where the name "Australian" came from, although a theory suggests that they were named for those imported sheep that they herded. It is also possible that many of the dogs coming from Australia were blue merle and the adjective "Australian" became associated with any dogs of that coat color.[7] The Australian Shepherd was initially called by many names, including Spanish Shepherd, Pastor Dog, Bob-Tail, New Mexican Shepherd, and California Shepherd.[32]

Filmdog Coffey which plays Timmy the dog in the film Famous Five (2012) on the Schleswig-Premiere

Recent history[edit]

Development of the breed began in the American West. The breed's foundation bloodlines are depicted in the Australian Shepherd Genealogy Chart showing the relationship between the early families of dogs.[33] The American Kennel Club ranked the Australian Shepherd as the 20th most popular breed in the United States in 2013.[34]

Selective breeding for many generations focused on aspects of the dog that enabled it to function as an effective stockdog in the American west. It had to handle severe weather; have plenty of speed, athleticism, energy, and endurance; and be intelligent, flexible, and independent, while remaining obedient. The actual foundation for the Australian shepherd was established between the 1940s and the early 1970s, when the Australian Shepherd Club of America was formed and the registry was started.[35] They became popular as performing dogs in rodeos. Their stunts and skills earned them places in several Disney films, including Run Appaloosa Run and Stub: The Greatest Cowdog in the West.[7][35] An Australian shepherd was featured in the film Flight of the Navigator (1986) and the TV-serie Flash Forward (1996). More recently, an Australian shepherd starred in the film Famous Five (2012) and its sequels.

Activities[edit]

A blue merle in a dog agility competition

Like other herding breeds, these dogs excel at many dog sports, especially herding, dog agility, frisbee, and flyball.[6] Herding instincts and trainability can be measured at noncompetitive instinct tests. Aussies that exhibit basic herding instincts can be trained to compete in ASCA stock dog trials or AKC herding events.[6][36]

The dog has a stride in which its front and back legs cross over, making for an appearance of "on the edge" speed. The dogs instinctively use a "pounce" position to deal with cattle trying to kick them. They also have strong hips and legs, allowing for fast acceleration and high jumping, sometimes as high as 4 ft (1.3m).

Australian Shepherd catching a frisbee

An Australian shepherd named Pockets is credited as being the oldest dog to earn a title in AKC history, having earned the Rally Novice title at the age of 15 years, 5 weeks.[37]

Miscellaneous[edit]

The Australian Shepherd Club of America (ASCA) was founded in 1957 to promote the breed. The National Stock Dog Registry became its official breed registry, which continued until ASCA took over in 1972.[38]

In 1975, ASCA created a breed standard, describing exactly how an Australian shepherd should look and be constructed (its conformation to the Standard). It developed more uniformity in the breed and standardized the type.

In the United States, the American Kennel Club is the primary registry for purebred dogs. The American Kennel Club first recognized the Australian Shepherd in 1991 as a member of the Herding Group.[6] However, many Aussie breeders felt that AKC put too much emphasis on breed conformity and not enough on performance, so the ASCA declined to join the AKC. Those breeders who felt that AKC membership had its advantages split off from ASCA to form their own Australian shepherd club, the United States Australian Shepherd Association, created their own breed standard, and joined the AKC in 1993. The decision about affiliation with the AKC remains controversial, as it does with many performance breeds.

The Fédération Cynologique Internationale recognized the Australian shepherd for international competition in 2007, in Group 1 Sheepdogs and Cattle Dogs as breed number 342.

The miniature Australian shepherd was developed by breeders looking for smaller dogs ranging in size from 14 inches and up to the Aussie standard. In 2010, NAMASCUSA renamed the breed, Miniature American Shepherds and subsequently changed their named to MASCUSA, The Miniature American Shepherd Club of the USA. This new breed gained acceptance into the AKC Miscellaneous class in June 2012 with the sizes written in the standard as females from 13-17 inches and males from 14-18 inches.

In addition, there is an emergence of an even smaller version, referred to as the toy Australian shepherd, with adult males tipping the scales at a mere 12 to 15 pounds (5.5 to 7 kg) and all dogs falling under a 14' height at the withers. The genetic consequences of breeding the standard Australian shepherd down to one-quarter size remain to be seen. Many breeders and owners of Australian shepherds consider the Mini and Toy to be separate breeds; others consider them to be downsized versions of the same breed. ASCA and AKC consider all such variants to be separate breeds.[1]

References[edit]

  1. ^ a b c "Australian Shepherd Breed Standard". Australian Shepherd Club of America, Inc. January 15, 1977. Retrieved April 3, 2011. 
  2. ^ Josh Dean. "The Australian Shepherd is from: A) Australia, B) England, C) Spain, D) None of the Above". 
  3. ^ United States Australian Shepherd Association. "About Aussies". 
  4. ^ "Vanished Trials and Faded Memories of Australian Shepherd History". American Kennel Club. 2007. Retrieved April 3, 2011. 
  5. ^ "The History of Australian Shepherds Chapter II: Timeline: Breed Development From Obscurity Into Mainstream Popularity". Las Rocosa Australian Shepherds. November 2008. Retrieved April 3, 2011. 
  6. ^ a b c d e f g "Get to Know the Australian Shepherd", 'The American Kennel Club', retrieved 19 May 2014
  7. ^ a b c d e f Coile, D. Caroline (1999). "History of the Australian Shepherd". Australian Shepherds. Barron's. pp. 5–7. 
  8. ^ "Basic Body Colors of the Australian Shepherd". Australian Shepherd Club of America, Inc. Retrieved April 3, 2011. 
  9. ^ a b "White-linked Deafness in Australian Shepherds". Australian Shepherd Club of America, Inc. 1998. Retrieved April 3, 2011. 
  10. ^ a b c "Is the Australian Shepherd Right for you?". Australian Shepherd Club of America, Inc. Retrieved April 3, 2011. 
  11. ^ a b "Aussie Personality & Character". Australian Shepherd Club of America, Inc. 1998. Retrieved April 3, 2011. 
  12. ^ "Working Description". Australian Shepherd Club of America, Inc. Retrieved April 3, 2011. 
  13. ^ "Hereditary Defects of the Australian Shepherd". Australian Shepherd Club of America, Inc. Retrieved April 3, 2011. 
  14. ^ "Canine Epilepsy". Australian Shepherd Club of America, Inc. 1999. Retrieved April 3, 2011. 
  15. ^ Dog Longevity Web Site, Breed Data page. Compiled by K. M. Cassidy. Retrieved July 8, 2007
  16. ^ a b Kennel Club/British Small Animal Veterinary Association Scientific Committee. 2004. Purebred Dog Health Survey. Retrieved July 5, 2007
  17. ^ Dog Longevity Web Site, Weight and Longevity page. Compiled by K. M. Cassidy. Retrieved July 5, 2007
  18. ^ "Collie Eye Anomaly (CEA)". Australian Shepherd Club of America, Inc. Retrieved April 3, 2011. 
  19. ^ "MDR1 FAQs". Australian Shepherd Health & Genetics Institute, Inc. Retrieved April 3, 2011. 
  20. ^ "Problem Drugs". Washington State University College of Veterinary Medicine. December 8, 2010. Archived from the original on 14 May 2011. Retrieved April 3, 2011. 
  21. ^ "Get Your Dog Tested". Washington State University College of Veterinary Medicine. January 19, 2011. Archived from the original on 29 April 2011. Retrieved April 3, 2011. 
  22. ^ "What's Wrong With White Aussies?". Retrieved 24 April 2014. 
  23. ^ "Homozygous "Lethal White" Merles". Retrieved 13 January 2013. 
  24. ^ "What is a double merle?". Retrieved 13 January 2013. 
  25. ^ "The History of Australian Shepherds Chapter III: Vanished Trails and Faded Memories of Australian Shepherd History (Aussie History Revisited)". Las Rocosa Australian Shepherds. 2010. Retrieved April 3, 2011. 
  26. ^ "ASCA Working Description of Aussies". Official Breed Club Site. 
  27. ^ "Ancient DNA Evidence for Old World Origin of New World Dogs". sciencemag. 2002. Retrieved June 21, 2011. 
  28. ^ "Chapter I: The Australian Shepherd and Breeds From a Common Root". Las Rocosa Australian Shepherds. 2010. Retrieved April 3, 2011. 
  29. ^ "The History of Australian Shepherds Chapter IV: Australian Shepherds and Sheep Ranching on the Open Range". Las Rocosa Australian Shepherds. 2010. Retrieved April 3, 2011. 
  30. ^ Hartnagle-Taylor, Jeanne Joy (1986). All About Aussies. Alpine Publishing. ISBN 1-57779-074-X. 
  31. ^ Rorem, Linda. Dog World magazine. 1987
  32. ^ The Australian Shepherd was initially called by many names, including Spanish Shepherd, Pastor Dog, Bob-Tail, New Mexican Shepherd, and California Shepherd.
  33. ^ "The Spider Web (Australian Shepherd Genealogy Chart)". Las Rocosa Australian Shepherds bob. Retrieved April 3, 2011. 
  34. ^ American Kennel Club 2013 Dog Registration Statistics Historical Comparisons & Notable Trends, The American Kennel Club, Retrieved 19 May 2014
  35. ^ a b Hartnagle, Carol Ann, Ernest (2006). The Total Australian Shepherd:Beyond the Beginning. Hoflin Publishing. ISBN 0-86667-072-6. 
  36. ^ Hartnagle-Taylor, Jeanne Joy; Taylor, Ty (2010). Stockdog Savvy. Alpine Publications. ISBN 978-157779-106-5. 
  37. ^ Thompson, Sally (November 10, 2005). "Plymouth dog sets American Kennel Club record". Minnesota Local News (Sun Newspapers). Retrieved April 3, 2011. 
  38. ^ "The History of The Australian Shepherd Club of America". Las Rocosa Australian Shepherds. Retrieved April 3, 2011. 

Further reading[edit]

  • Hartnagle, Carol Ann, Hartnagle, Ernest (2006). Total Australian Shepherd: Beyond the Beginning. Hoflin Publishing. ISBN 0-86667-072-6. 
  • Hartnagle-Taylor, Jeanne Joy (2005). All About Aussies. Alpine Publishing. ISBN 1-57779-074-X. 
  • Hartnagle-Taylor, Jeanne Joy; Taylor, Ty (2010). Stockdog Savvy. Alpine Publications. ISBN 978-157779-106-5. 
  • Cunliffe, Juliette (2004). The Encyclopedia of Dog Breeds. Parragon Publishing. ISBN. 
  • Fogle, Bruce (2000). The New Encyclopedia of the Dog. Dorling Kindersley (DK). ISBN. 
  • Renna, Christine Hartnagle (2000). Herding Dogs: Selection and Training the Working Farm Dog. Kennel Club Books. ISBN 978-1-59378-737-0. 

External links[edit]