Rabu, 01 April 2009

Lab Appearance

Labradors are relatively large, with males typically weighing 30–36 kg (65–80 lb) and females 25–32 kg (55–70 lb). Labs weighing close to or over 100 lbs are considered obese or having a major fault under American Kennel Club standards, although some labs weigh significantly more. The majority of the characteristics of this breed, with the exception of colour, are the result of breeding to produce a working retriever.

As with some other breeds, the English (typically "show" or "bench") and the American (typically "working" or "field") lines differ. Today, "English" and "American" lines exist in both the United Kingdom and in North America. In general, however, in the United Kingdom, Labs tend to be bred as medium-sized dogs, shorter and stockier with fuller faces and a slightly calmer nature than their American counterparts, which are regionally often bred as taller, lighter-built dogs. These two types are informal and not codified or standardised; no distinction is made by the AKC or other kennel clubs, but the two types come from different breeding lines. Australian stock also exists; though not seen in the west, they are common in Asia.

Colour

There are three recognised colours for Labs: black (a solid black colour), yellow (anything from light cream to gold to "fox-red"), and chocolate (medium to dark brown). There are no such things as silver or golden Labradors, a common mistake for the Yellow variant. There is also a black-and-tan coat type, but this coat colour is the least popular as it renders the Labrador un-showable except in the UK.

Fox Red Labrador

Puppies of all colours can potentially occur in the same litter. Colour is determined primarily by two genes. The first gene (the B locus) determines the density of the coat's pigment granules: dense granules result in a black coat, sparse ones give a chocolate coat. The second (E) locus determines whether the pigment is produced at all. A dog with the recessive e allele will produce little pigment and will be yellow regardless of its genotype at the B locus. Variations in numerous other genes control the subtler details of the coat's colouration, which in yellow Labs varies from white to light gold to a fox red. Chocolate and black Labs' noses will match the coat colour.

Nose and skin pigmentation

Because Labrador colouration is controlled by multiple genes, it is possible for recessive genes to emerge some generations later and also there can sometimes be unexpected pigmentation effects to different parts of the body. Pigmentation effects appear in regard to yellow Labradors, and sometimes chocolate, and hence the majority of this section covers pigmentation within the yellow Labrador. The most common places where pigmentation is visible are the nose, lips, gums, feet, tail, and the rims of the eyes, which may be black, brown, light yellow-brown ("liver", caused by having two genes for chocolate), or several other colours. A Labrador can carry genes for a different colour, for example a black Labrador can carry recessive chocolate and yellow genes, and a yellow Labrador can carry recessive genes for the other two colours. DNA testing can reveal some aspects of these. Less common pigmentations (other than pink) are a fault, not a disqualification, and hence such dogs are still permitted to be shown.The intensity of black pigment on yellow Labs is controlled by a separate gene independent of the fur colouring.Yellow Labradors usually have black noses, which may gradually turn pink with age (called "snow nose" or "winter nose"). This is due to a reduction in the enzyme tyrosinase which indirectly controls the production of melanin, a dark colouring. Tyrosinase is temperature dependent—hence light colouration can be seasonal, due to cold weather—and is less produced with increasing age two years old onwards. As a result, the nose colour of most yellow Labs becomes a somewhat pink shade as they grow older.[

A Yellow Labrador with a pink nose.

A colouration known as "Dudley" is also possible. Dudleys are variously defined as yellow Labs which have no pigmented (pink) noses (LRC), yellow with liver/chocolate pigmentation (AKC), or "flesh coloured" in addition to having the same colour around the rims of the eye, rather than having black or dark brown pigmentation.[12][9] A yellow Labrador with brown or chocolate pigmentation, for example, a brown or chocolate nose, is not necessarily a Dudley, though according to the AKC's current standard it would be if it has chocolate rims around the eyes (or more accurately of the genotype eebb). Breed standards for Labradors considers a true Dudley to be a disqualifying feature in a conformation show Lab, such as one with a thoroughly pink nose or one lacking in any pigment along with flesh coloured rims around the eyes. True Dudleys are extremely rare.[12][13]

Breeding in order to correct pigmentation often lacks dependability. Because colour is determined by many genes, some of which are recessive, crossbreeding a pigmentation non-standard yellow Labrador to a black Labrador may not correct the matter or prevent future generations carrying the same recessive genes. For similar reasons, crossbreeding chocolate to yellow labs is also often avoided.

[edit] Variant lines

These chocolate Labradors from field-bred stock are typically lighter in build and have a shorter coat than conformation show Labrador.

Differences in the physical build of the dog have arisen as a result of specialised breeding. Dogs bred for hunting and field-trial work are selected first for working ability, whereas dogs bred to compete in the sport of conformation showing are selected for the characteristics sought by judges in the show ring. There are significant differences between field and trial-bred (sometimes referred to as "American") and show-bred (or "English") lines of Labradors. In general, show-bred Labs are heavier, slightly shorter-bodied, and have a thicker coat and tail. Field Labs are generally longer legged, lighter, and more lithe in build. In the head, show Labs tend to have broader heads, better defined stops, and more powerful necks, while field Labs have lighter and slightly narrower heads with longer muzzles. Field-bred Labs are commonly higher energy and more high-strung compared to the Lab bred for conformation showing, and as a consequence may be more suited to working relationships rather than being a "family pet." Of course, each individual dog differs. Some breeders, especially those specialising in the field type, feel that breed shows do not adequately recognise their type of dog. There is also occasional debate regarding officially splitting the breed. In the United States, the AKC and the Labrador's breed club have set the breed standard to accommodate the field-bred Labrador somewhat. For instance, the AKC withers-height standards allow conformation dogs to be slightly taller than the equivalent British standard. However, dual champions, or dogs that excel in both the field and the show ring, are becoming more unusua]

Non-variants

Terms such as "golden", "silver", "blue", "white", "red" or "grey" as variants are not recognised. The term "Golden Labrador" has been used both as an incorrect term for yellow labradors of a golden shade,and also for any Labrador-Golden Retriever crossbreed of any colour, including black.White is a light shade of yellow (officially referred to as 'light cream' or 'pale yellow' in the standard), and silver is either not recognised or registered as chocolate (officially registered by the AKC as chocolate labs with variant colour).Claims that some "rare" variants exist or have been verified by DNA testing, or the like, are widely considered to be a 'scam'.

The breed tends to shed hair twice annually, or regularly throughout the year in temperate climates. Some labs shed a lot; however, individual labs vary. Labrador hair is usually fairly short and straight, and the tail quite broad and strong. The otter-like tail and webbed toes of the Labrador Retriever make them excellent swimmers. Their interwoven coat is also relatively waterproof, providing more assistance for swimming.

Show standards

Like any animal, there is a great deal of variety among Labs. These characteristics are typical of the conformation show bred (bench-bred) lines of this breed in the United States, and are based on the AKC standard. Significant differences between US and UK standards are noted.

  • Size: Labs are a medium-large but compact breed. They should have an appearance of proportionality. They should be as long from the shoulders back as they are from the floor to the withers. Males should stand 22.5-24.5 inch (55.9-62.5 cm) tall at the withers and weigh 65–80 lb (30–36 kg). Females should stand 21.5–23.5 inch (54.5–60 cm) and weigh 55–70 lb (25–32 kg). By comparison under UK Kennel Club standards, height should be 22–22.5 inch (55.9–57.2 cm) for males, and 21.5–22 inch (54.6–55.9 cm) for bitches.
  • Coat: The Lab's coat should be short and dense, but not wiry. The coat is described as 'water-resistant' or more accurately 'water-repellent' so that the dog does not get cold when taking to water in the winter. That means the dog naturally has a slightly dry, oily coat. Acceptable colours are chocolate, black, and yellow. A small white spot on the chest on black labs is the only acceptable variance from a solid coloured coat, but it is not ideal. There is much variance within yellow Labs. Colours should be solid, though varying shades of yellow on the same dog are acceptable in yellow labs. There has been an increase in the demand for "white" Labs, which are simply Labradors with a very light yellow coat.
  • Head: The head should be broad with a pronounced stop and slightly pronounced brow. The eyes should be kind and expressive. Appropriate eye colours are brown and hazel. The lining around the eyes should be black. The ears should hang close to the head and are set slightly above the eyes.
  • Jaws: The jaws should be strong and powerful. The muzzle should be of medium length, and should not be too tapered. The jaws should hang slightly and curve gracefully back.
  • Body: The body should be strong and muscular with a level top line.
Chocolate Labrador
The tail and coat are designated "distinctive [or distinguishing] features" of the Labrador by both the Kennel Club and AKC.The AKC adds that "true Labrador Retriever temperament is as much a hallmark of the breed as the 'otter' tail."

History of Lab


The Labrador Retriever was developed in England in the mid 1800s by a handful of private kennels dedicated to developing and refining the perfect gundog. That many such kennels were pursuing their own vision of such a dog is the reason behind the variety of today's retriever breeds.

Early ancestors

It's fairly clear that there were no indigenous dogs in Newfoundland when the first fishing companies arrived. If the native Americans of the time had any, the explorers never observed them. Thus it's quite likely that the St. Johns dogs themselves come from old English Water Dogge breeds, insofar as fishermen were the primary people on Newfoundland for centuries. There is also some speculation that the old St. Hubert's dog might have been brought over as well -- illustrations of the breed show a black, drop-eared dog with a certain resemblance to the Labrador. But it is unknown if the fishermen going to Newfoundland would have had hound dogs used for game rather than water dogs.

We can only speculate what happened, but we do know that the cod fishermen sent out from Britain practiced "shore fishing." Small dories were used for the actual fishing, and they worked in teams of four -- two in the boat and two on the shore to prepare and cure the fish. They would have needed a small dog to get in and out of the boat, with a short water repellent coat so as not to bring all the water into to the boats with them. They would have bred for a strong retrieving instinct to help retrieve fish and swimming lines, and a high degree of endurance to work long hours. If the runs were heavy, the fishermen were reputed to go for as long as twenty hours to haul the fish in.

The dog developed for this early work could be found in several varieties: a smaller one for the fishing boats, and a larger one with a heavier coat for drafting. The smaller dog has been called, variously, the Lesser St. John's dog, the Lesser Newfoundland, or even the Labrador. These dogs came from Newfoundland; it is unknown why the name "Labrador" was chosen except possibly through geographical confusion. Charles Eley, in History of Retrievers at the end of the 19th century comments:

The story [...] was that the first Labrador to reach England swam ashore from vessels which brought cod from Newfoundland [...] It was claimed for them that their maritime existence [...] had resulted in webbed feet, a coat impervious to water like that of an otter, and a short, thick 'swordlike' tail, with which to steer safely their stoutly made frames amid the breakers of the ocean.

Part of the confusion over the names is that "St. John's dog" and "Newfoundland dog" were used interchangeably for both the greater (larger) and lesser (smaller) varieties. And the term Labrador has also been used to refer to the lesser St. John's dog, especially in the latter half of the 19th century. The greater is commonly held to be the direct ancestor of today's Newfoundland, while the lesser was used to develop many of the retrieving breeds, including today's Labrador.

The exact relationship between the two varieties of the St. Johns dog (and some 19th century writers listed up to four varieties) is also unclear; we don't know which came first, or to what degree they were related. Certainly the greater St. Johns dog was first imported to England nearly a hundred years earlier, and many contemporary and modern day writers assume that the lesser was developed from the greater but we have no real evidence one way or another. Newfoundland has been used for fishing and other activities since approximately 1450 so there has been plenty of time for the development of the St. Johns dog and its varieties.

Development in England

From the time these dogs were first imported back to England in the early 1800s to 1885 when the combined effects of Newfoundland's Sheep Act and Britain's Quarantine Act shut down further importation, a handful of kennels regularly imported lesser St. Johns dogs and carefully bred them for gun dog work on their estates. These kennels include those of Buccleugh and Malmesbury, each of which imported lesser St. John's dogs throughout the 19th century for their private lines.

The second Earl of Malmesbury (1778-1841) and his son the third Earl (1807-1889) imported the dogs and kept their lines going until the third Earl's death. In a letter he wrote in about 1887 he noted:

"We always called mine Labrador dogs and I have kept the breed as pure as I could from the first I had from Poole, at that time carrying on a brisk trade with Newfoundland. The real breed may be known by their having a close coat which turns the water off like oil, above all, a tail like an otter."

At about the same time, the fifth Duke of Buccleugh (1806-1884), his brother Lord John Scott (1809-1860) and the tenth Earl of Home (1769-1841) embarked on a similar but independent program. They lived within a 30 mile radius and developed the Buccleugh line. The eleventh Lord of Home (1799-1881) continued his dogs, but the line was nearly extinct about the time of his death.

However, a chance meeting between the third Earl of Malmesbury and the sixth Duke of Buccleugh and the twelfth Earl of Home resulted in the older Malmesbury giving the two young Lords some of the dogs from his lines. From these dogs, given in 1882, the Buccleugh line was revitalized and the breed carried into the 20th century. Buccleugh's Ned and Buccleugh's Avon are generally agreed upon as being the ancestors of all Labradors.

That two different kennels, breeding independently for at least 50 years, had such similar dogs argues that the Labrador was kept very close to the original St. John's breed. Thus it is probable that today's Labrador, of all the modern retrievers, is the most closely related to the original St. John's dog and by extension, as closely related to the modern Newfoundland as to the other retriever breeds such as Golden Retrievers, Flat Coat Retrievers, etc.

The Twentieth Century

By the turn of the century, these retrievers were appearing in the British Kennel Club's events. At this point, retrievers from the same litter could wind up being registered as different retrievers. The initial category of "Retrievers" included curly coats, flat coats, liver-colored retrievers and the Norfolk retriever (now extinct). As types became fixed, separate breeds were created for each and the Labrador Retriever finally gained its separate registration under the Kennel Club in 1903.

While there have been strains of Labradors bred pure up to this time, it is unknown how many of these cross-bred dogs were folded into "Labradors" or into other breeds as the registrations began to separate. Many breeders feel that crossbreeding at this time accounts for much of the poor type that can appear today; however claims about the use of Pointers or Rottweilers can probably be safely discounted.

The first two decades in the 20th century saw the formation in Britain of some of the most influential kennels that provided the basis for the breed as we know it today. Lord Knutsford's Munden Labradors, and Lady Howe's Banchory Labradors are among several. At this time, many dogs distinguished themselves in both field trials and conformation shows; the high number of Dual Champions at this time attests to the breed's versatility.

Labradors were first imported to the United States during World War I. At this point, the AKC still classified them as "Retrievers;" it was not until the late 1920's that the retrievers were split up into the breeds we know today in the AKC. The Labrador Retriever has been used heavily in the US as a gundog; the American Labrador Retriever Club, Inc. (LRC, Inc), is to this day primarily a field trial organization, and it was instrumental in forming the AKC field trials.

The two World Wars greatly diminished the breed in numbers (as it did many others). After the second World War saw the rise of the Labrador Retriever in the United States, where Britain's Sandylands kennel through imports going back to Eng CH Sandyland's Mark influenced the shape and direction the show lines took in this country. Other influential dogs include American Dual CH Shed of Arden, a grandson of English Dual CH Banchory Bolo, especially evident in field trial lines.

This return trip to the Americas resulted in the widely expanded use of the Labrador as a gun dog. In Britain, the Labrador was, and still is, used primarily for upland game hunting, often organized as a driven bird shoot. Typically, separate breeds were used for different tasks; and the Labrador was strictly for marking the fall, tracking and retrieving the game. But in the United States and Canada, the breed's excellence at waterfowl work and game finding became apparent and the Labrador soon proved himself adaptable to the wider and rougher range of hunting conditions available. The differences between British and American field trials are particularly illustrative.