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67-438: The PON is a muscular, thick-coated dog. The double coat can be of any color or pattern; white, gray, and brown are most common, with black, gray, or brown markings. It is common for colors to fade as the dogs reach adulthood. The undercoat is soft and dense, while the topcoat is rough and either straight or wavy, but not curly. The hair around the head makes the head appear to be larger than it actually is, and typically covers

134-443: A d/d dilution of black pigment, a grey colouration that is grey from birth, but has a wide range of breed-specific meanings. In Kerry Blue Terriers , Poodles , and Bearded Collies , "blue" refers to colouration that is black at birth and progressively greys out as the dog matures. In Australian Shepherds , Rough Collies , and Shetland Sheepdogs , blue means a blue (black-based) merle . In Australian Silky Terriers , blue means

201-610: A single coat have a coat composed solely of guard hairs, with little or no downy undercoat. The terms fur and hair are often used interchangeably when describing a dog's coat, however in general, a double coat, like that of the Newfoundland and most livestock guardian dogs , is referred to as a fur coat , while a single coat, like that of the Poodle , is referred to as a hair coat . Domestic dogs exhibit diverse coat colours and patterns . In many mammals, different colour patterns are

268-418: A different type of hair. Down hair (also known as underfur , undercoat , underhair or ground hair ) is the bottom – or inner – layer, composed of wavy or curly hairs with no straight portions or sharp points. Down hairs, which are also flat, tend to be the shortest and most numerous in the coat. Thermoregulation is the principal function of the down hair, which insulates

335-409: A dog called red is usually a clear sable (with little to no eumelanin tipping on hairs) or a ruddy recessive yellow. In some breeds, "red" refers to what would usually be called brown, chocolate, or liver. A "red merle" is always a liver-based merle. In Australian Cattle Dogs , "red" stands for a densely ticked liver-based colouration with an overall red-grey appearance. Gold refers specifically to

402-419: A layer of dry air next to the skin. The awn hair can be thought of as a hybrid, bridging the gap between the distinctly different characteristics of down and guard hairs. Awn hairs begin their growth much like guard hairs, but less than halfway to their full length, awn hairs start to grow thin and wavy like down hair. The proximal part of the awn hair assists in thermoregulation (like the down hair), whereas

469-529: A long, straight, and non-wired coat in the Pomeranian . Additionally, breeds show variation in patterns of growth - that is to say, parts of the dog's body where the coat may be longer or shorter. The same gene that controls wiriness of hair also causes furnishings to be present (e.g. beard, moustache, eyebrows) - compare the bearded collie , furnishings present, to the border collie , which lacks furnishings. Some breeds show feathering: fringes of longer hair on

536-739: A low protein diet. The life expectancy of a PON is approximately 12 years. Known in its present form in Poland from at least the thirteenth century, the PON is most likely descended from the Puli , Tibetan Terrier and the herding dogs . Legend has it that the Polish Lowland Sheepdog was part-ancestor of the Bearded Collie . Almost driven to extinction in World War II , the PON was restored mainly through

603-580: A moderate amount of exercise daily. The Polish Lowland Sheepdog can compete in dog agility trials, obedience , Rally obedience , showmanship , flyball , tracking , and herding events. Herding instincts and trainability can be measured at noncompetitive herding tests. PONs that exhibit basic herding instincts can be trained to compete in herding trials. In general, PONs are a very healthy breed. Animals should be checked for hip dysplasia and checked for eye abnormalities such as PRA (Progressive Retinal Atrophy) before being used for breeding. PONs require

670-427: A rich reddish-yellow and its variants, whereas yellow can refer to any shade of yellow and tan. Terms used include yellow-gold, lion-colored, fawn, apricot, wheaten, tawny, straw, yellow-red, mustard, sandy, honey, blond, and lemon. Dogs called golden or yellow tend to be recessive yellow, but can also be sable. Cream refers to a pale yellowish or tannish colour which can be almost white. Fawn typically refers to

737-468: A saddle-type black and tan pattern, where the black parts of the coat progressively fade to a steel grey as the dog matures and in Australian Cattle Dogs , blue stands for a densely ticked black-based colouration with an overall blue-grey appearance. Grey simply means a grey colouration of any shade. It can be used as an alternative synonym of blue, but tends to mean some other type of grey than

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804-484: A silver is a quicker to clear, much lighter grey that can range from a pale platinum to a steel grey. Both are black at birth with minimal markings to indicate future change. Similarly, café au lait is a slower and darker and silver beige a quicker and lighter progressively greying brown, i.e. liver. White : Such a light cream that it is seen and described as pure white, making them distinct from albino dogs. A white dog, as opposed to an albino one, has dark pigment around

871-400: A yellow, tan, light brown, or cream dog that has a dark melanistic mask. With Weimaraners , fawn refers to their typical brownish grey colouration that with other breeds is usually called lilac. Black is a pure black that can get grizzled as the dog ages, or have a tendency to gain a brownish cast when exposed to the elements. Blue is a cool-toned, metallic grey. It typically means

938-464: Is a pro-inflammatory compound. It is critical to note once again that canines are unable to interconvert between omega fatty acids and over supplying linoleic acid promotes excessive inflammation in the body, which can potentially reverse the coat benefits seen by supplying omega fatty acids in the diet. In contrast, linoleic acid is also required for epidermal lipid function and water retention, which benefits coat shine. Having linoleic acid present in

1005-536: Is an anti-inflammatory compound. Linolenic acid is found in the oil from flaxseeds, soybean and canola. Some better known examples of linolenic acid are the metabolic derivatives eicosapentaenoic acid (EPA) and docosahexanoic acid (DHA). EPA inhibits the enzyme delta-5-desaturase, which prevents the synthesis of arachidonic acid which is an inflammatory omega 6. DHA acts even earlier in omega 6 metabolism, by inhibiting delta-6-desaturase . The anti-inflammatory properties of omega 3s stem from their ability to inhibit

1072-535: Is an outward indicator of internal well-being. For this reason, coat health is an important aspect of pet care to many dog owners. Dog coats can be impacted by nutritional components from the diet. Below is a table that summarizes the effects of several nutrients (minerals, vitamins) on the domestic canine coat, based on current evidence: Zinc contributes to hair growth and can prevent hair from becoming dry and brittle. In addition to, zinc when supplemented in combination with linoleic acids has been found to improve

1139-416: Is crucial to achieve optimal benefits. Proper omega 6:3 ratios have been shown to diminish allergy triggered immune responses, thus improving overall coat condition. The National Research Council (NRC) recommends a 2.6:1 to 26:1 omega 6:3 ratio for adult dog maintenance diets. The proper ratio of these fatty acids is crucial because each has an opposing role in inflammation within the body and both compete for

1206-417: Is driven largely by camouflage. Differences in female and male coat color may indicate nutrition and hormone levels, important in mate selection. Some arboreal mammals, notably primates and marsupials, have shades of violet, green, or blue skin on parts of their bodies, indicating some distinct advantage in their largely arboreal habitat due to convergent evolution . The green coloration of sloths, however,

1273-504: Is either very short or docked in the United States. European countries have banned docking for the most part and many PONs now have tails of varying lengths. Polish Lowland Sheepdogs are stable and self-confident. They have an excellent memory and can be well trained, but may dominate a weak-willed owner. PONs adapt well to various conditions, and are popular as companion dogs for apartment dwellers in their native Poland. PONs require

1340-445: Is the result of a symbiotic relationship with algae. Coat color is sometimes sexually dimorphic , as in many primate species . Coat color may influence the ability to retain heat, depending on how much light is reflected. Mammals with darker colored coats can absorb more heat from solar radiation and stay warmer; some smaller mammals, such as voles , have darker fur in the winter. The white, pigmentless fur of arctic mammals, such as

1407-670: The Sphynx cat . Similarly, there are some breeds of hairless dogs . Other examples of artificially selected hairless animals include the hairless guinea-pig , nude mouse , and the hairless rat . Fur has long served as a source of clothing for humans, including Neanderthals . Historically, it was worn for its insulating quality, with aesthetics becoming a factor over time. Pelts were worn in or out, depending on their characteristics and desired use. Today fur and trim used in garments may be dyed bright colors or to mimic exotic animal patterns, or shorn close like velvet . The term "a fur" may connote

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1474-449: The d/d dilution of black. Synonyms include silver, pepper, grizzle, slate, blue-black grey, black and silver, steel. Greys of a dusty or brownish cast are often lilac, a d/d dilution of liver, and this colouration does not have much of a commonly recognised name. Across various breeds, it is called lavender, silver-fawn, isabella, fawn, café au lait or silver beige. In Poodles, a blue is a very slowly fading, very dark steel grey, whereas

1541-499: The distal part can shed water (like the guard hair). The awn hair's thin basal portion does not allow the amount of piloerection that the stiffer guard hairs are capable of. Mammals with well-developed down and guard hairs also usually have large numbers of awn hairs, which may even sometimes be the bulk of the visible coat. Guard hair ( overhair ) is the top—or outer—layer of the coat. Guard hairs are longer, generally coarser, and have nearly straight shafts that protrude through

1608-542: The fur industry as a furbearer . The use of fur as clothing or decoration is controversial; animal welfare advocates object to the trapping and killing of wildlife, and the confinement and killing of animals on fur farms . The modern mammalian fur arrangement is known to have occurred as far back as docodonts , haramiyidans and eutriconodonts , with specimens of Castorocauda , Megaconus and Spinolestes preserving compound follicles with both guard hair and underfur. Fur may consist of three layers, each with

1675-522: The muskox has guard hairs measuring 30 cm (12 in) as well as a dense underfur, which forms an airtight coat, allowing them to survive in temperatures of −40 °C (−40 °F). Some desert mammals, such as camels, use dense fur to prevent solar heat from reaching their skin, allowing the animal to stay cool; a camel's fur may reach 70 °C (158 °F) in the summer, but the skin stays at 40 °C (104 °F). Aquatic mammals , conversely, trap air in their fur to conserve heat by keeping

1742-411: The showing of purebred dogs . Breed standards often include a detailed description of the nature and attributes of that breed's ideal coat. A dog's coat is composed of two layers: a top coat of stiff guard hairs that help repel water and shield from dirt, and an undercoat of soft down hairs , to serve as insulation. Dogs with both under coat and top coat are said to have a double coat . Dogs with

1809-519: The vizslas , to the wiry coat of a Scottish Terrier and the corded coat of the Puli and the Komondor . Generally, coats vary along three categories: length (long vs. short), texture (curly vs. straight), and coarseness (wire-haired vs. non-wire). These three categories all interact with one another; thus, one can see a short, curly, and wired coat in the Wirehaired Pointing Griffon , and

1876-475: The Polish Lowland Sheepdog as a breed in the Herding Group in 2001. Double coat The coat of the domestic dog refers to the hair that covers its body. Dogs demonstrate a wide range of coat colors, patterns, textures, and lengths. As with other mammals, a dog's fur has many uses, including thermoregulation and protection from cuts or scratches; furthermore, a dog's coat plays an important role in

1943-438: The allergenicity more than breed or gender." The nature and quality of a purebred dog 's coat is important to the dog fancy in the judging of the dog at conformation shows . The exact requirements are detailed in each breed's breed standard and do not generalise in any way, and the terminology may be very different even when referring to similar features. See individual breed articles for specific information. A dog's coat

2010-431: The black-and-white pelage of many mammals which are able to defend themselves, such as in the foul-smelling skunk and the powerful and aggressive honey badger . In arctic and subarctic mammals such as the arctic fox ( Vulpes lagopus ), collared lemming ( Dicrostonyx groenlandicus ), stoat ( Mustela erminea ), and snowshoe hare ( Lepus americanus ), seasonal color change between brown in summer and white in winter

2077-568: The body begins to produce the usual hair growth and color it would before the deficiency took place. Polyunsaturated fatty acids found in the diet play a critical role in the maintenance of a healthy coat in dogs, and have even been shown to improve coat condition when supplemented in the diet. Furthermore, diets lacking essential fatty acids in their diet will manifest as unkept, matted coat. Omega fatty acids 3 and 6 are highly unsaturated fatty acids, making them especially metabolically active. The proper combination of these omega fatty acids

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2144-517: The body is present in breeds such as the Chinese Crested or the Xoloitzcuintli . Shedding of hair can occur continuously, but in many breeds is strongly influenced by hormones. Seasonal shedders shed most in spring and fall, following an increase or decrease in day length, and least in summer and winter, in response to constant day length. Cold temperatures stimulate hair growth, so that

2211-636: The canine diet is an important aspect of coat health. The fat soluble vitamins (A, D, E and K) require lipids present in the diet for absorption, transport and deposition in canine adipose tissue. The specific role of vitamins A and E for coat health are explored elsewhere in this article, as they pertain to immune function. Another pet food regulating body, the Association of American Feed Control Officials (AAFCO), recommends that Vitamin E supplementation increase as polyunsaturated fatty acids are added to diet in order to counteract lipid oxidation and maintain

2278-412: The coat of canines by reducing water loss in the trans-epidermal layer of the skin. Dogs can obtain zinc in their diet, through the addition of various ingredients, including; red meats, whole grains, poultry by-product meals, and fish meals. Copper is a trace mineral that is required in the diet of canines at 7.3 mg/kg. Copper is involved in multiple enzymatic pathways. In dogs, a lack of copper in

2345-707: The colour relationships between modern dogs and wolves, white wolves from North America, yellow dogs, and yellowish wolves from Tibet. The study concludes that during the Late Pleistocene, natural selection laid the genetic foundation for modern coat colour diversity in dogs and wolves. During evolution of the dog from their wolf ancestors, coat colors in dogs were probably the inadvertent outcome of some other selective process, and were not likely initially selected for intentionally by humans. Research has found that tameness brings associated physical changes, including coat colouring and patterning. Domestic dogs often display

2412-502: The diet has demonstrated a positive effect on skin, and thus by extension, coat. Down hair Fur is a thick growth of hair that covers the skin of almost all mammals . It consists of a combination of oily guard hair on top and thick underfur beneath. The guard hair keeps moisture from reaching the skin; the underfur acts as an insulating blanket that keeps the animal warm. The fur of mammals has many uses: protection, sensory purposes, waterproofing, and camouflaging, with

2479-433: The diet, leading to a copper deficiency, results in incomplete keratinization. This leads to a dry coat, hypo-pigmentation, and discoloration of the coat. Selenium is another one of the many trace minerals essential for a dog's diet. Selenium is typically required in lower levels in comparison to other minerals. It is involved in the prevention of oxidative damage as well as the production of anti-oxidants. Selenium aids in

2546-506: The ears, belly, tail, and back of the legs (e.g., Saluki and any of the setters ). Dogs also vary in the thickness of the undercoat. Some dogs have only a single (rather than a double) coat, or a very reduced undercoat (e.g. the Vizsla ), which results in a thinner coat. Certain breeds, especially spitz-type breeds , tend to have a thicker undercoat, which helps retain heat in cold and wet weather. Furthermore, complete hairlessness on parts of

2613-434: The eye rims and nose, often coupled with dark-colored eyes. There is often some coat identifiable as cream between the dog's shoulder blades. Extreme piebald dogs can also appear all white, but are caused by a separate factor. The same pattern may be referred to differently in different breeds. Basset Hound Dogs demonstrate an enormous diversity in coat length and texture, from the very short and smooth coat seen in

2680-432: The eyes. Males are 45–50 cm (18–20 in) in height at the withers , while females are 42–47 cm (17–19 in). Males typically weigh between 40 – 50 lb, females, 30 – 40 lb. The body is just off square, it appears rectangular due to the abundance of coat on the chest and rear; the ratio of the height to the body length should be 9:10 (a 45 cm tall dog should have a body 50 cm long). The tail

2747-495: The first official standard for the PON was finally written, and accepted by the FCI, Fédération Cynologique Internationale , in 1959. He is considered to be the 'father' of the modern Polish Lowland Sheepdog. His moderate build lends itself to working effortlessly all day long, running with ease to herd the sheep. Pictures of Smok can be seen in the book, "The Official Book of the Polish Lowland Sheepdog". The American Kennel Club recognized

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2814-556: The fur. Although breeds such as poodles , Bedlington terriers , bichons , yorkies , and wire-haired terriers are commonly represented as being hypoallergenic due to reduced shedding, the reaction that an individual person has to an individual dog may vary greatly. In a report, describing dog allergen extracts of dog hair, belonging to patients' dogs or from dogs of the same breed, with low molecular mass that are absent in extracts of commercial allergen test kits, it has been found that "[f]actors related to individual dogs seem to influence

2881-418: The gene HR can lead to complete hair loss , though this is not typical in humans. At times, when a hairless domesticated animal is discovered, usually owing to a naturally occurring genetic mutation, humans may intentionally inbreed those hairless individuals and, after multiple generations, artificially create hairless breeds. There are several breeds of hairless cats, perhaps the most commonly known being

2948-407: The hair development, most stages of growth are completed, but it was found that in the last stage, where biotin levels were insufficient, there was an incorrect keratinization of the root of the hair, causing the hair to fall out of the body. The supplementation of biotin cannot reverse affects caused by deficiency, but as soon as supplementation is given and biotin levels are restored to adequacy,

3015-399: The hair follicle growth cycle: "[D]ogs are a relevant source of allergens, but diagnosing dog-related allergies may present difficulties .." Some dog breeds have been promoted as hypoallergenic (which means less allergic , not free of allergens) because they shed very little. However, no canine is known to be completely nonallergenic. Often the problem is with the dog's saliva or dander, not

3082-750: The heaviest shedding is in spring on dogs living in cold climates. Artificial lighting can alter the seasonal shedding pattern of dogs who live indoors. Other hormonal influences include dietary factors, reproductive hormones in intact dogs, and various medical conditions and disorders. Shedding that is done in a short period of time is known as "blowing the coat" or "blowing coat". Among the other coat types, dogs with fine silky coats (e.g., spaniels) are generally moderate shedders, those with an intermediate coat texture (e.g., mountain dogs) are generally heavy shedders, and those with thick stand-offish coats (e.g., spitzes) are generally very heavy shedders. "Non-shedding" dogs have greatly-reduced shedding due to alterations to

3149-438: The importance of biotin in coat pigmentation. There different stages of hair development, as shown in clinical studies using mice. Each stage of hair development has a different sensitivity to biotin present in the body. For example, the shaft development is not greatly affected by biotin access. During the last stage, the amount of biotin available for use by the body will alter the success of that development greatly. Throughout

3216-499: The inflammatory action of omega 6 fatty acids. A functional minimum has not been set forth by AAFCO, as one has yet to be determined. A reduction in inflammation of somatic tissues, skin especially, supports coat health. Omega 6 fatty acid, also known as linoleic acid , is found in poultry fat and the oil from safflower, sunflower, corn and flaxseed. Arachidonic acid is a well known metabolic derivative of linoleic acid, found only in animal sources. As mentioned above, arachidonic acid

3283-476: The largest extant terrestrial mammals, the elephant and the rhinoceros , are largely hairless. The hairless bat is mostly hairless but does have short bristly hairs around its neck, on its front toes, and around the throat sac, along with fine hairs on the head and tail membrane. Most hairless animals cannot go in the sun for long periods of time, or stay in the cold for too long. Marsupials are born hairless and grow out fur later in development. Humans are

3350-421: The layer of softer down hair. The distal end of the guard hair is the visible layer of most mammal coats. This layer has the most marked pigmentation and gloss , manifesting as coat markings that are adapted for camouflage or display. Guard hair repels water and blocks sunlight, protecting the undercoat and skin in wet or aquatic habitats, and from the sun's ultraviolet radiation. Guard hairs can also reduce

3417-498: The most common terms used to refer to the bb-dilution of black pigment to a dark brown . Depending on breed and exact shade, terms such as mahogany, midtone brown, grey-brown, blackish brown are used. Sedge and deadgrass are used to describe the desired Chesapeake Bay Retriever color that resembles "that of its working surroundings" as closely as possible. Red refers to reddish shades of orange, brown, and tan. Terms used include orange, red-gold, cinnamon, tan, and ruby. Genetically

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3484-476: The only primate species that have undergone significant hair loss. The hairlessness of humans compared to related species may be due to loss of functionality in the pseudogene KRTHAP1 (which helps produce keratin ) Although the researchers dated the mutation to 240 000 ya, both the Altai Neandertal and Denisovan peoples possessed the loss-of-function mutation, indicating it is much older. Mutations in

3551-674: The outermost layer of the skin for the cortisol cells of the hair follicle. A deficiency in vitamin A can cause the common symptoms of dermatitis (dry, scaling skin and dull coat). Vitamin B7, also known as biotin , is a water-soluble nutrient that is known to play a role associated with the maintenance and development of hair starting from the follicle . Although it has not been clinically shown to improve hair growth with supplementation alone, it has been shown to reverse deficiency in dogs born deficient. Symptoms of biotin deficiency include alopecia and achromotrichia . A clinical study of biotin showed

3618-641: The polar bear, may reflect more solar radiation directly onto the skin. The term pelage  – first known use in English c.  1828 (French, from Middle French, from poil for 'hair', from Old French peilss , from Latin pilus ) – is sometimes used to refer to an animal's complete coat . The term fur is also used to refer to animal pelts that have been processed into leather with their hair still attached. The words fur or furry are also used, more casually, to refer to hair-like growths or formations, particularly when

3685-493: The potency. In addition, high fat diets in dogs were shown to dramatically improve coat sheen and appearance. It is thought excess cholesterol esters are incorporated into the hair follicle, leading to the improved coat appearance. The same study, by Kirby, Hester and Bauer (2007), stated the optimal approach to an improved coat in dogs is a combination of increased dietary fat and the proper amount of polyunsaturated fatty acids. Omega 3 fatty acid, also known as linolenic acid ,

3752-446: The predator or prey. An alternative explanation is that the dorsal and ventral sides of an animal experience different selection pressures (from the need to blend into different backgrounds when viewed from above and below) resulting in differing coloration. The same colour may be referred to differently in different breeds. Likewise, a same term may mean different colourations in different breeds. Brown , chocolate and liver are

3819-464: The primary usage being thermoregulation. The types of hair include Hair length is negligible in thermoregulation, as some tropical mammals, such as sloths, have the same fur length as some arctic mammals but with less insulation; and, conversely, other tropical mammals with short hair have the same insulating value as arctic mammals. The denseness of fur can increase an animal's insulation value, and arctic mammals especially have dense fur; for example,

3886-509: The promotion of coat growth. Lack of selenium in the diet of a dog can contribute to the occurrence of sparse coat growth. Dogs can obtain selenium in their diet through the addition of various ingredients including; tuna fish, halibut, sardines, beef, chicken, and egg. Vitamin A deficiency can lead to rough coat, scaling of skin, and other dermatitis issues like alopecia . It is also essential for cells to properly proliferate keratinocytes, which are epithelial cells that produce keratin on

3953-412: The remnants of countershading , a common natural camouflage pattern. The basic principle of countershading is when the animal is lit from above, shadows will be cast on the ventral side of the body. These shadows could provide a predator or prey with visual cues relating to the movement of the animal. By being lighter colored on the ventral side of the body, an animal can counteract this, and thereby fool

4020-458: The result of the regulation of the Agouti gene , which can cause hair follicles to switch from making black or brown pigments to yellow or nearly white pigments. The most common coat pattern found in modern wolves is agouti , in which the upperside of the body has banded hairs and the underside exhibits lighter shading. The colour yellow is dominant to the colour black and is found in dogs across much of

4087-479: The same enzymatic pathway. Dogs, like many mammals, lack the desaturase enzymes capable of interconverting omega 3 and 6 fatty acids. Therefore, the amount of inflammation in the body is dependent on the ratio between omega 3 and 6 fatty acids. Too little inflammation suppresses the immune system and the body's ability to heal, however excessive inflammation can irritate the skin and reduce the coat's overall appearance. Aside from omega fatty acids, lipid content in

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4154-717: The severity of cuts or scratches to the skin. Many mammals, such as the domestic dog and cat, have a pilomotor reflex that raises their guard hairs as part of a threat display when agitated. Hair is one of the defining characteristics of mammals; however, several species or breeds have considerably reduced amounts of fur. These are often called "naked" or "hairless". Some mammals naturally have reduced amounts of fur. Some semiaquatic or aquatic mammals such as cetaceans , pinnipeds and hippopotamuses have evolved hairlessness, presumably to reduce resistance through water. The naked mole-rat has evolved hairlessness, perhaps as an adaptation to their subterranean lifestyle. Two of

4221-413: The skin dry. Mammalian coats are colored for a variety of reasons, the major selective pressures including camouflage , sexual selection , communication, and physiological processes such as temperature regulation. Camouflage is a powerful influence in many mammals, as it helps to conceal individuals from predators or prey. Aposematism , warning off possible predators, is the most likely explanation of

4288-410: The subject being referred to exhibits a dense coat of fine, soft "hairs". If layered, rather than grown as a single coat , it may consist of short down hairs, long guard hairs , and in some cases, medium awn hairs . Mammals with reduced amounts of fur are often called "naked", as with the naked mole-rat , or "hairless", as with hairless dogs . An animal with commercially valuable fur is known within

4355-404: The work of Dr. Danuta Hryniewicz and her dog, Smok ("Dragon"), the ancestor of all PONs in the world today, who sired the first ten litters of PONs in the 1950s. In fact, Dr. Hryniewicz considered Smok to be the epitome of the breed, with a perfect anatomical build and a wonderful temperament. Smok set the standard and type that was emulated by PON breeders for generations to come, and from which

4422-556: The world and the dingo in Australia. In 2021, a study of whole genome sequences taken from dogs and wolves focused on the genetic relationships between them based on coat colour. The study found that most dog colour haplotypes were similar to most wolf haplotypes, however dominant yellow in dogs was closely related to white in arctic wolves from North America. This result suggests a common origin for dominant yellow in dogs and white in wolves but without recent gene flow, because this clade

4489-724: Was found to be genetically basal to the golden jackal and genetically distinct from all other canids. The most recent common ancestor of the golden jackal and the wolf lineage dates back to 2 million years ago. The study proposes that 35,000 years ago there was genetic introgression into the Late Pleistocene grey wolf from a ghost population of an extinct canid which had diverged from the grey wolf lineage over 2 million years ago. This colour diversity could be found 35,000 years ago in wolves and 9,500 years ago in dogs. A closely related haplotype exists among those wolves of Tibet which possess yellow shading in their coats. The study explains

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