Samoyed (dog)

Samoyed
Other names Bjelkier, Samoiedskaya Sobaka, Nenetskaya Laika
Nicknames Smiley
Sammy
Country of origin Northwest Russia and Western Siberia
Patronage Nordic Kennel Union
Traits
Height Male 51–56 cm (20–22 in)
Female 46–51 cm (18–20 in)
Dog (Canis lupus familiaris)

The Samoyed (/ˈsæməjɛd/ SAM-ə-yed or /səˈmɔɪ.ɛd/ sə-MOY-ed;[1][2] Russian: Самоедская собака or Самоед) is a breed of dog that takes its name from the Samoyedic peoples of Siberia. These nomadic reindeer herders bred the fluffy white dogs to help with the herding, and to pull sleds when they moved. An alternate name for the breed, especially in Europe, is Bjelkier.[3]

Appearance

Samoyed

Size

Height:
AKC Standard : 21–23.5 inches (53–60 cm) at the shoulder for males, 19–21 inches (48–53 cm) for females.
UK Kennel Club Standard : 51–56 centimetres (20–22 in) for males, 46–51 centimetres (18–20 in) for females.

Eyes

Samoyed eyes are usually black or brown and are almond in shape. Blue or other color eyes can occur but are not allowed in the show ring. It is in the "brown and black section" in its family, the Spitz family.

Ears

Samoyed ears are thick and covered with fur, triangular in shape, and erect. They are almost always white but can often have a light to dark brown tint (known as "biscuit"), usually around the tips of the ears.

Tail

The Samoyed tail is one of the breed's more distinguishing features. Like the Alaskan Malamute, the tail is carried curled over the back; however, unlike the Malamute, the Samoyed tail is held actually touching the back. It should not be a tight curl or held flag-like; it should be carried lying over the back and to one side. In cold weather, Samoyeds may sleep with their tails over their noses to provide additional warmth. Almost all Samoyeds will allow their tails to fall when they are relaxed and at ease, as when being stroked or while eating, but will return their tails to a curl when more alert.

NZKC Standard: Tail: Long and profuse, carried over the back when alert; sometimes dropped when at rest.

UK Kennel Club Standard : Tail : Long and profusely coated, carried over the back and to the side when alert, sometimes dropped when at rest.

Coat

Samoyeds have a dense, double layer coat. The topcoat contains long, coarse, and straight guard hairs, which appear white but have a hint of silver coloring. This top layer keeps the undercoat relatively clean and free of debris. The under layer, or undercoat, consists of a dense, soft, and short fur that keeps the dog warm. The undercoat typically sheds heavily once or twice a year, and this seasonal process is sometimes referred to as "blowing coat". This does not mean the Samoyed will shed only during that time however; fine hairs (versus the dense clumps shed during seasonal shedding) will be shed all year round, and have a tendency to stick to cloth and float in the air. The standard Samoyed may come in a mixture of biscuit and white coloring, although pure white and all biscuit dogs are common. Males typically have larger ruffs than females. While this breed is sometimes touted as "hypoallergenic", this is generally not the case. While the breed may produce less allergens, reactions are still possible.[4]

Temperament

An active Samoyed

Samoyeds' friendly disposition makes them poor guard dogs; an aggressive Samoyed is rare. The breed is characterized by an alert and happy expression which has earned the nicknames "Sammie smile" and "smiley dog."[5] With their tendency to bark, however, they can be diligent watch dogs, barking whenever something approaches their territory. Samoyeds are excellent companions, especially for small children or even other dogs, and they remain playful into old age. When Samoyeds become bored, they may begin to dig. With their sled dog heritage, a Samoyed is not averse to pulling things, and an untrained Samoyed has no problem pulling its owner on a leash rather than walking alongside. Samoyeds were also used to herd reindeer. They will instinctively act as herd dogs, and when playing with children, especially, will often attempt to turn and move them in a different direction.

Activities

Samoyeds can compete in dog agility trials, carting, obedience, showmanship, flyball, tracking, mushing and herding events. Herding instincts and trainability can be measured at noncompetitive herding tests. Samoyeds exhibiting basic herding instincts can be trained to compete in herding trials.[6]

Health

A male Samoyed

Genetic diversity

The Samoyed is a primitive dog belonging to the spitz or northern dog group, specifically the laikas: a Eurasian dog type used for a variety of purposes, namely hunting, herding, guarding, and sledding. The Samoyed is descended from the Nenets herding laika, a dog that comes in not only white, but also a wider variety of colors. Like many breeds, the Samoyed was bred from a small number of founders (in this case, from Siberia). The founder effect then led to a reduction in genetic diversity, which may explain why some Samoyeds today are affected by the genetic disorders below.

Samoyed hereditary glomerulopathy

The breed can be affected by a genetic disease known as Samoyed hereditary glomerulopathy, a renal disease. The disease is known to be caused by an X-linked dominant faulty allele and therefore the disease is more severe in male Samoyeds.[7] Also known as hereditary nephritis, it is caused by a nonsense mutation in codon 1027 of the COL4A5 gene on the X chromosome (glycine to stop codon), which is similar to Alport's syndrome in humans.

Carrier females do develop mild symptoms after 2–3 months of age, but mostly[8] do not go on to develop renal failure. The disease is caused by a defect in the structure of the type-IV collagen fibrils of the glomerular basement membrane. As a consequence, the collagen fibrils of the glomerular basement membrane are unable to form cross-links, so the structural integrity is weakened and the membrane is more susceptible to "wear-and-tear" damage. As the structure of the basement membrane begins to degenerate, plasma proteins are lost in the urine and symptoms begin to appear. Affected males appear healthy for the first three months of life, but then symptoms start to appear and worsen as the disease progresses: the dog becomes lethargic and muscle wastage occurs, as a result of proteinuria. From three months of age onwards, a reduced glomerular filtration rate is detected, indicative of progressive renal failure. Death from renal failure usually occurs by 15 months of age.

Clinically, proteinuria is found in both sexes from the age of three to four months; in dogs older than this, renal failure in combination with more or less pronounced hearing loss occurs swiftly and death at the age of 8 to 15 months is expected. In heterozygous females, the disease develops slowly. The disease can be treated to slow down the development by use of cyclosporine A and ACE inhibitors, but not be stopped.[7][9][10][11]

If a carrier female is mated with a healthy stud dog, the female offspring have a 50% chance of being carriers for the disease, and any male offspring have a 50% chance of being affected by the disease. A genetic test is available for this disease.[12]

Other health concerns

Samoyed pup

For the Samoyeds in the veterinary literature several breed-specific hereditary diseases are described:

History

Samoyed circa 1915

Samoyeds are descended from the Nenets herding laika, a spitz-type dog from Siberia used for sledding, herding, guarding, and keeping their owners warm.

Fridtjof Nansen believed that the use of sled dogs was the only effective way to explore the north and used Samoyeds on his polar expeditions. His plan to feed the weaker dogs to the stronger ones as the former died during the expedition ultimately consumed nearly all of his dogs.

The Samoyed has been identified as a basal breed that predates the emergence of the modern breeds in the 19th Century.

Use of fur

Samoyed

Shed Samoyed fur is sometimes used as an alternative to wool in knitting, with a texture similar to angora. The fur is sometimes also used for the creation of artificial flies for fly fishing. Samoyed fur sweaters have been reported to handle temperatures well below freezing.

In popular culture

References

  1. ↑ "Merriam-Webster Pronunciation" (website). Merriam-Webster. Retrieved 8 October 2011.
  2. ↑ "Pronunciation of Samoyed" (website). inogolo. Retrieved 8 October 2011.
  3. ↑ "Exploring Genetic Diversity in Samoyeds With a Genome-Wide DNA Analysis". Retrieved 2014-12-04.
  4. ↑ Bakalar, Nicholas. "The Myth of the Allergy-Free Dog". The New York Times. Retrieved 18 July 2015.
  5. ↑ "AKC Meet the Breeds: Samoyed" (website). American Kennel Club. Retrieved 8 October 2011.
  6. ↑ Hartnagle-Taylor, Jeanne Joy; Taylor, Ty (2010). Stockdog Savvy. Alpine Publications. ISBN 978-1-57779-106-5.
  7. 1 2 Jansen, B; Tryphonas, L; Wong, J; Thorner, P; Maxie, MG; Valli, VE; Baumal, R; Basrur, PK (1986). "Mode of inheritance of Samoyed hereditary glomerulopathy: an animal model for hereditary nephritis in humans". The Journal of laboratory and clinical medicine 107 (6): 551–5. PMID 3711721.
  8. ↑ Rawdon, TG (2001). "Juvenile nephropathy in a Samoyed bitch". The Journal of small animal practice 42 (5): 235–8. doi:10.1111/j.1748-5827.2001.tb02027.x. PMID 11380016.
  9. ↑ Zheng, K; Thorner, PS; Marrano, P; Baumal, R; McInnes, RR (1994). "Canine X chromosome-linked hereditary nephritis: a genetic model for human X-linked hereditary nephritis resulting from a single base mutation in the gene encoding the alpha 5 chain of collagen type IV". Proceedings of the National Academy of Sciences of the United States of America 91 (9): 3989–93. doi:10.1073/pnas.91.9.3989. PMC 43708. PMID 8171024.
  10. ↑ Grodecki, K; Gains, M; Baumal, R; Osmond, D; Cotter, B; Valli, V; Jacobs, R (1997). "Treatment of X-linked hereditary nephritis in samoyed dogs with angiotensin converting enzyme (ACE) inhibitor". Journal of Comparative Pathology 117 (3): 209–225. doi:10.1016/S0021-9975(97)80016-3. PMID 9447482.
  11. ↑ Chen, D.; Jefferson, B; Harvey, SJ; Zheng, K; Gartley, CJ; Jacobs, RM; Thorner, PS (2003). "Cyclosporine A Slows the Progressive Renal Disease of Alport Syndrome (X-Linked Hereditary Nephritis): Results from a Canine Model". Journal of the American Society of Nephrology 14 (3): 690–8. doi:10.1097/01.ASN.0000046964.15831.16. PMID 12595505.
  12. ↑ "Samoyed Hereditary Glomerulopathy". vetgen.com. Veterinary Genetic Services. Retrieved 3 February 2013.
  13. ↑ Kimmel, SE; Ward, CR; Henthorn, PS; Hess, RS (2002). "Familial insulin-dependent diabetes mellitus in Samoyed dogs". Journal of the American Animal Hospital Association 38 (3): 235–8. doi:10.5326/0380235. PMID 12022409.
  14. ↑ Short, A. D.; Catchpole, B.; Kennedy, L. J.; Barnes, A.; Fretwell, N.; Jones, C.; Thomson, W.; Ollier, W. E.R. (2007). "Analysis of Candidate Susceptibility Genes in Canine Diabetes". Journal of Heredity 98 (5): 518–525. doi:10.1093/jhered/esm048. PMID 17611256.
  15. ↑ Dice, P. F. 2nd (1980). "Progressive retinal atrophy in the Samoyed". Modern veterinary practice 61 (1): 59–60. PMID 7366567.
  16. ↑ Zangerl, B.; Johnson, J. L.; Acland, G. M.; Aguirre, G. D. (2007). "Independent Origin and Restricted Distribution of RPGR Deletions Causing XLPRA". Journal of Heredity 98 (5): 526–530. doi:10.1093/jhered/esm060. PMID 17646274.
  17. ↑ Meyers, VN; Jezyk, PF; Aguirre, GD; Patterson, DF (1983). "Short-limbed dwarfism and ocular defects in the Samoyed dog". Journal of the American Veterinary Medical Association 183 (9): 975–79. PMID 12002589.
  18. ↑ Acland, Gregory M. (1991). "Retinal dysplasia in the Samoyed dog is the heterozygous phenotype of the gene (drds) for short limbed dwarfism and ocular defects". Transactions of the American College of Veterinary Ophthalmology 22: 44.
  19. ↑ Pellegrini, B; Acland, GM; Ray, J (2002). "Cloning and characterization of opticin cDNA: evaluation as a candidate for canine oculo-skeletal dysplasia". Gene 282 (1–2): 121–131. doi:10.1016/S0378-1119(01)00842-3. PMID 11814684.
  20. ↑ McCaw, D; Aronson, E (1984). "Congenital cardiac disease in dogs". Modern veterinary practice 65 (7): 509–12. PMID 6749116.
  21. ↑ Martin, SW; Kirby, K; Pennock, PW (1980). "Canine hip dysplasia: breed effects". The Canadian veterinary journal. La revue veterinaire canadienne 21 (11): 293–6. PMC 1789813. PMID 7459792.
  22. ↑ Craig, Mark (2006). "Clinical refresher: Canine sebaceous adenitis". Companion Animal 11 (5): 62–8. doi:10.1111/j.2044-3862.2006.tb00066.x.
  23. ↑ "Individual Breed Results for Purebred Dog Health Survey". TheKennelClub.org.uk.

Further reading

External links

Wikimedia Commons has media related to Samoyed.

Samoyed (dog) at DMOZ


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