What to know about your dog's skin and coat

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Your Pooches skin and coat is very interesting

THE MODERN DOMESTIC DOG'S SKIN AND COAT

A Comprehensive Guide to Canine Skin Anatomy, Hair Structure, Functions, Genetics, Nutrition, Grooming and Common Skin Conditions

1. Introduction to the Canine Skin and Coat

The skin is the largest organ of the dog's body and forms the primary physical barrier between the animal and its surrounding environment.

It is a complex, living organ that works continuously to protect the body from injury, infection, dehydration, harmful substances and environmental influences.

The coat, consisting primarily of hair, provides an additional protective layer. Depending on the breed, it may also offer insulation against cold, protection from sunlight and assistance with environmental adaptation.

Together, the skin and coat form an integrated protective system that is essential to the dog's health and survival.

The skin is not simply an outer covering. It contains:

Blood vessels.
Nerve endings and sensory receptors.
Hair follicles.
Sweat glands.
Sebaceous glands.
Immune cells.
Connective tissue.
Pigment-producing cells.

These structures work together to maintain skin integrity and support several important physiological processes.

The main functions of the skin and coat include:

Protecting the body against physical damage.
Providing a barrier against bacteria, fungi and other microorganisms.
Preventing excessive water loss.
Helping regulate body temperature.
Providing sensory information.
Protecting against ultraviolet radiation.
Supporting immune defence.
Contributing to communication and social interaction.

Healthy skin and a well-maintained coat are therefore important indicators of a dog's general wellbeing.

2. The Structure of a Dog's Skin

A dog's skin consists of three principal layers:

Epidermis.
Dermis.
Subcutaneous tissue (hypodermis).

Each layer has its own specialised structure and function.

2.1 The Epidermis

The epidermis is the outermost layer of the skin.

It forms the first line of defence against the external environment.

The epidermis is made primarily of specialised cells called keratinocytes, which produce a protective protein known as keratin.

Keratin contributes to the strength and protective properties of the skin.

The epidermis also contains other important cells, including:

Melanocytes.
Langerhans cells.
Merkel cells.

Keratinocytes

Keratinocytes are the predominant cells of the epidermis.

They are produced in the deeper layers and gradually move towards the surface.

As they mature, they produce keratin and undergo structural changes before eventually forming the outer protective layer.

This process is called keratinisation.

Melanocytes

Melanocytes produce melanin, the pigment responsible for much of the colour of the skin and hair.

Melanin helps protect skin cells against ultraviolet radiation.

The amount and distribution of melanin contribute to differences in skin pigmentation between individual dogs and breeds.

Langerhans cells

These are specialised immune cells that help recognise foreign substances and participate in the skin's immune defence.

Merkel cells

Merkel cells are associated with sensory nerve endings and contribute to the perception of light touch.

The outer protective barrier

The outermost part of the epidermis is called the stratum corneum.

It consists of flattened, dead keratinised cells embedded in a lipid-rich structure.

It is often compared to a brick wall:

The dead skin cells represent the bricks.
The surrounding lipids represent the mortar.

This arrangement helps prevent excessive water loss and limits the entry of harmful substances and microorganisms.

A healthy epidermal barrier is essential for maintaining normal skin hydration and preventing irritation.

2.2 The Dermis

The dermis lies directly beneath the epidermis.

It is a thicker connective tissue layer that provides much of the skin's strength, flexibility and structural support.

The dermis contains:

Collagen fibres.
Elastin fibres.
Blood vessels.
Lymphatic vessels.
Nerve endings.
Hair follicles.
Sebaceous glands.
Sweat glands.
Small muscles associated with hair follicles.

Collagen

Collagen is a structural protein that gives the skin strength and resistance to stretching.

Elastin

Elastin allows the skin to stretch and return towards its original shape.

Blood vessels

Blood vessels supply the skin with oxygen and nutrients and assist in temperature regulation.

When a dog becomes warm, changes in blood flow through the skin contribute to heat exchange with the environment.

Nerve endings

The dermis contains sensory structures that help dogs detect touch, pressure, temperature and potentially painful stimuli.

The dermis is therefore important not only for physical protection but also for sensory perception.

2.3 Subcutaneous Tissue (Hypodermis)

The subcutaneous tissue lies beneath the dermis.

It consists primarily of connective tissue and varying amounts of fat.

Its functions include:

Insulating the body.
Storing energy.
Cushioning underlying structures.
Allowing the skin to move over deeper tissues.
Connecting the skin to muscles and other structures.

The amount of subcutaneous fat varies depending on the dog's body condition, breed, age and individual anatomy.

This layer also contains blood vessels and nerves.

3. The Structure of a Dog's Hair

Hair is one of the most recognisable features of the domestic dog.

Although different breeds have dramatically different coats, their hair is made primarily from keratin.

Individual hairs develop within specialised structures called hair follicles.

A typical hair shaft consists of three principal structural components.

3.1 Cuticle

The cuticle is the outermost layer of the hair shaft.

It consists of overlapping, scale-like cells that protect the inner parts of the hair.

A healthy cuticle helps maintain the hair's structural integrity and influences its appearance and texture.

Damage to the cuticle can contribute to roughness, tangling, breakage and a dull coat.

3.2 Cortex

The cortex is the main structural component of the hair shaft.

It contains keratin fibres and contributes to:

Hair strength.
Flexibility.
Elasticity.
Texture.
Much of the hair's natural colour.

Most of the hair's structural properties depend on the cortex.

3.3 Medulla

The medulla is the central region of the hair shaft.

It may contain loosely arranged cells and air spaces.

Its presence and structure vary between different hair types.

Some fine hairs have little or no visible medulla.

4. Hair Follicles and Hair Growth

A hair follicle is a specialised structure within the skin from which an individual hair develops.

Hair follicles are essential for producing, maintaining and replacing the dog's coat.

A follicle contains several important components.

Hair bulb

The hair bulb is located at the base of the follicle.

It contains actively dividing cells responsible for producing the hair shaft.

Dermal papilla

The dermal papilla is a specialised connective tissue structure at the base of the hair bulb.

It contains blood vessels that supply nutrients and oxygen to the growing hair.

It also participates in signalling processes that regulate hair growth.

Sebaceous gland

Sebaceous glands are usually associated with hair follicles.

They produce an oily substance called sebum.

Sebum helps lubricate the skin and hair and contributes to the skin's protective surface barrier.

Arrector pili muscle

This is a small smooth muscle attached to the hair follicle.

When it contracts, it causes the hair to stand more upright.

In dogs, this contributes to piloerection, commonly referred to as raised hackles.

Raised hackles can occur during excitement, fear, stress, aggression or other emotional states.

It is not necessarily an indication that a dog is aggressive.

5. The Different Types of Dog Coats

One of the most fascinating characteristics of domestic dogs is the extraordinary variation in their coats.

Selective breeding has produced dogs with short hair, long hair, curly hair, wiry hair, double coats and even naturally hairless bodies.

Coat characteristics are influenced by genetics, breed history, environmental adaptation and individual variation.

5.1 Smooth or Short Coats

Examples include:

Boxer.
Dobermann.
Great Dane.
Staffordshire Bull Terrier.
Rhodesian Ridgeback.

These dogs have relatively short hair that lies close to the body.

Their coats are generally easier to maintain than long or heavily coated breeds.

However, short-haired dogs still shed, and their skin may be more exposed to sunlight, scratches and environmental irritation.

5.2 Double Coats

A double coat consists of two principal hair types:

Guard hairs: The longer outer hairs that help protect against moisture, dirt and environmental exposure.

Undercoat: The softer, denser layer of hair beneath the guard hairs that provides insulation.

Examples include:

Siberian Husky.
German Shepherd.
Golden Retriever.
Border Collie.
Chow Chow.
Pomeranian.

Double-coated dogs often experience seasonal changes in shedding.

During periods of heavier shedding, large quantities of undercoat may be released.

This is sometimes referred to as blowing the coat.

Double coats should be groomed appropriately to remove loose hair and prevent matting.

Routine shaving of a double-coated dog is generally discouraged unless there is a medical or specific veterinary reason.

Shaving can interfere with the coat's natural protective and insulating functions and may alter subsequent hair growth.

5.3 Long Coats

Examples include:

Afghan Hound.
Yorkshire Terrier.
Maltese.
Shih Tzu.
Lhasa Apso.

Long-coated breeds have hair that grows to considerable lengths.

These coats may require frequent brushing to prevent tangles and matting.

Some long-coated breeds have hair that grows continuously or sheds relatively little, while others shed more noticeably.

5.4 Curly or Wavy Coats

Examples include:

Poodle.
Portuguese Water Dog.
Bichon Frise.
Curly-Coated Retriever.

Curly coats have a distinctive structure that causes the hair to bend or curl.

Loose hairs can become trapped within the coat rather than falling away naturally.

Regular brushing and appropriate trimming are therefore important.

Although some curly-coated breeds shed less visibly, no dog should automatically be considered completely non-shedding or guaranteed hypoallergenic.

5.5 Wire or Rough Coats

Examples include:

Border Terrier.
Wire Fox Terrier.
Scottish Terrier.
Schnauzer.
Airedale Terrier.

Wire coats have a rougher, harsher outer texture.

Some breeds have a softer undercoat beneath the wiry outer hairs.

Certain wire-coated breeds benefit from hand-stripping, a grooming technique that removes mature dead guard hairs.

5.6 Hairless Breeds

Examples include:

Chinese Crested Hairless.
Xoloitzcuintli.
Peruvian Inca Orchid.

Hairless dogs have little or no body hair over much of their skin, although some may have hair on their heads, feet or tails.

Their skin is more directly exposed to environmental influences.

Particular attention should be given to:

Sun protection.
Skin hydration.
Prevention of irritation.
Temperature protection.
Regular skin examinations.

Hairless dogs are not free from skin conditions simply because they have little hair.

6. The Functions of the Dog's Skin and Coat

The skin and coat perform several essential functions.

6.1 Physical Protection

The skin protects underlying tissues against:

Abrasion.
Minor cuts and scratches.
Environmental irritants.
Certain chemical substances.
Microorganisms.

The coat provides an additional physical barrier.

However, neither the skin nor the coat offers complete protection against all injuries or harmful substances.

6.2 Temperature Regulation

The coat helps regulate heat exchange between the dog and its environment.

A dense coat can trap air close to the skin, providing insulation.

This is particularly useful in cold conditions.

However, the coat is only one part of temperature regulation.

Dogs primarily lose excess heat through panting, with additional heat exchange occurring through the skin and other surfaces.

The ability of a particular coat to provide insulation depends on its structure, density, condition and environmental circumstances.

6.3 Protection Against Ultraviolet Radiation

Melanin in the skin and hair helps protect tissues against ultraviolet radiation.

Hair also physically shields parts of the skin from direct sunlight.

Dogs with thin coats, pale skin, exposed areas or hairless bodies may be more susceptible to sun damage.

Areas such as the nose, ears and sparsely haired abdomen can be particularly vulnerable.

6.4 Sensory Perception

The skin contains specialised sensory receptors and nerve endings.

These allow dogs to detect:

Touch.
Pressure.
Temperature.
Pain.
Movement of hairs.

Whiskers, also known as vibrissae, are particularly sensitive specialised hairs.

They are associated with highly innervated follicles and help dogs detect nearby objects and changes in their surroundings.

Whiskers should not be routinely cut for cosmetic purposes.

6.5 Immune Protection

The skin forms an important part of the immune system.

It provides a physical barrier and contains immune cells that help identify and respond to potentially harmful organisms.

The skin also supports a community of microorganisms known as the skin microbiome.

When the skin barrier is healthy, these microorganisms can contribute to maintaining a balanced skin environment.

Disruption of this balance can sometimes contribute to skin disease.

6.6 Communication

The skin and coat contribute to canine communication.

Examples include:

Raised hackles.
Changes in facial expression.
Ear positioning.
Tail positioning.
Scent production from specialised skin glands.

The dog's coat can also communicate information about health and general condition.

A dull, brittle or excessively shedding coat may indicate an underlying nutritional, environmental or medical problem.

7. Skin Pigmentation and Coat Colour

Dog coat colours and patterns are among the most varied characteristics in domestic animals.

Pigmentation is influenced by specialised cells called melanocytes, which produce melanin.

There are two principal forms of melanin relevant to canine coat colour.

Eumelanin

Eumelanin produces black and brown pigmentation.

Phaeomelanin

Phaeomelanin produces yellow, golden, cream and reddish pigmentation.

The distribution, intensity and modification of these pigments are influenced by several genes.

These genes contribute to the remarkable range of colours and patterns found in domestic dogs.

Examples include:

Black.
Brown.
Chocolate.
Red.
Cream.
Golden.
White.
Blue or diluted black.
Brindle.
Merle.
Sable.

Some coat colours are also associated with particular genetic health risks.

For example, certain colour-dilution genes can be associated with colour dilution alopecia in susceptible dogs.

Merle breeding also requires careful genetic consideration because breeding two merle-patterned dogs can increase the risk of serious hearing and eye abnormalities in offspring.

Is a white dog always an albino?

No.

White coat colour does not automatically mean that a dog has albinism.

White coats can result from several different genetic mechanisms affecting pigment production and distribution.

True albinism involves a significant reduction or absence of melanin production.

8. The Hair Growth Cycle

Dog hair does not grow continuously at the same rate throughout the year.

Individual hair follicles pass through a repeating cycle of growth, transition, rest and shedding.

The principal phases are:

8.1 Anagen – Growth Phase

During anagen, the hair follicle is actively producing new hair.

Cells in the hair bulb divide and contribute to the formation of the hair shaft.

The duration of this phase varies considerably between breeds and coat types.

In some dogs, hair can grow for extended periods, while in others the growth phase is relatively short.

8.2 Catagen – Transition Phase

Catagen is a transitional stage.

Hair growth slows and the lower part of the follicle undergoes structural changes.

The hair stops growing actively.

8.3 Telogen – Resting Phase

During telogen, the follicle is relatively inactive.

The existing hair remains in the follicle while the follicle prepares for another growth cycle.

8.4 Exogen – Shedding Phase

During exogen, the old hair is released.

A new hair may already be developing or may begin growing as the cycle continues.

Why do dogs shed?

Shedding is a normal biological process.

It allows old or damaged hairs to be replaced with new ones.

Some dogs shed relatively consistently throughout the year, while others experience more noticeable seasonal shedding.

Factors influencing shedding include:

Genetics.
Breed.
Coat type.
Daylight exposure.
Temperature.
Hormones.
General health.
Nutrition.

Indoor living and artificial lighting can also influence seasonal shedding patterns.

9. The Dog's Skin Microbiome

The skin microbiome consists of microorganisms living on the surface of the skin and within its surrounding environment.

These include:

Bacteria.
Fungi.
Yeasts.
Other microscopic organisms.

Not all microorganisms are harmful.

Many are normal inhabitants of healthy skin.

They interact with the skin's immune system and can help prevent certain harmful microorganisms from becoming established.

Malassezia yeast

One particularly important organism is Malassezia pachydermatis.

This yeast can normally be found on canine skin and in areas such as the ears.

Under certain circumstances, excessive growth can contribute to skin inflammation.

Affected dogs may develop:

Itching.
Redness.
Greasy skin.
A strong or unpleasant odour.
Darkened or thickened skin.
Ear inflammation.

Staphylococcus bacteria

Certain Staphylococcus species are commonly found on canine skin.

However, some can contribute to bacterial skin infections when the skin barrier is damaged or other predisposing factors are present.

Maintaining healthy skin is therefore about more than simply keeping the dog clean.

Over-bathing, harsh shampoos and inappropriate skin products can disrupt the natural skin barrier.

10. The Role of Nutrition in Healthy Skin and Coat

Nutrition plays a major role in maintaining healthy skin and producing a strong, well-conditioned coat.

The skin is a metabolically active organ and requires a continuous supply of nutrients.

Hair production also requires amino acids, energy, vitamins, minerals and essential fatty acids.

A poor or unbalanced diet can contribute to:

Dull coat appearance.
Excessive shedding.
Dry or flaky skin.
Brittle hair.
Poor hair growth.
Reduced skin-barrier function.

Let's examine the important nutrients.

10.1 Protein

Hair is composed primarily of keratin, a structural protein.

The body requires amino acids to manufacture keratin and maintain skin tissue.

Protein is therefore essential for:

Hair production.
Skin repair.
Tissue maintenance.
Normal immune function.
Growth and development.

Inadequate protein intake can contribute to poor coat quality and impaired skin health.

The quality and amino acid composition of dietary protein are important, not simply the percentage printed on a food label.

10.2 Essential Fatty Acids

Essential fatty acids are particularly important for maintaining the skin barrier.

Two important families are:

Omega-3 fatty acids

These include EPA and DHA, which are associated with anti-inflammatory processes.

Omega-6 fatty acids

Linoleic acid is an essential omega-6 fatty acid that plays an important role in maintaining the skin barrier.

Dogs cannot manufacture linoleic acid in sufficient quantities, so it must be supplied through their diet.

A suitable balance of essential fatty acids contributes to:

Skin hydration.
Normal barrier function.
Healthy hair growth.
Coat condition.
Normal inflammatory regulation.

10.3 Zinc

Zinc is an essential mineral involved in:

Skin-cell development.
Wound healing.
Immune function.
Protein synthesis.
Normal hair growth.

Zinc deficiency can result in skin abnormalities and hair loss.

Certain breeds may also have inherited problems affecting zinc absorption or metabolism.

10.4 Vitamin A

Vitamin A contributes to normal skin-cell growth and differentiation.

Both deficiency and excessive intake can cause health problems.

It is important that dogs receive appropriate quantities through a complete and balanced diet.

10.5 Vitamin E

Vitamin E is an antioxidant that helps protect cell membranes from oxidative damage.

It contributes to normal skin and cellular health.

10.6 B Vitamins

B vitamins support energy metabolism and normal cellular processes.

Biotin, for example, is involved in several metabolic pathways associated with skin and hair health.

However, biotin supplementation is not automatically necessary for dogs eating a nutritionally complete diet.

10.7 Copper

Copper contributes to normal pigmentation, connective tissue formation and other important biological functions.

It participates in enzymes involved in melanin production.

10.8 Water

Hydration is essential for normal skin function.

Water supports circulation, nutrient transport and cellular activity.

Although drinking more water does not directly cure dry skin, adequate hydration is important for overall health.

An important nutritional consideration

A complete and balanced diet should provide the nutrients required for normal skin and coat maintenance.

Adding individual vitamins, minerals or oils without considering the complete diet can create nutritional imbalances.

Excessive supplementation is not necessarily beneficial.

11. Common Skin and Coat Problems in Dogs

Skin problems are among the most common reasons dogs are taken to veterinary practices.

They can arise from parasites, allergies, infections, hormonal conditions, genetic factors, environmental influences and nutritional problems.

Some conditions affect only small areas, while others involve much of the body.

11.1 Allergic Dermatitis

Allergic dermatitis occurs when a dog's immune system reacts to substances that are normally harmless.

Common allergens include:

Environmental allergens.
Certain components of food.
Flea saliva.
Contact allergens.

Signs can include:

Persistent itching.
Redness.
Licking and chewing.
Hair loss.
Recurrent ear infections.
Secondary skin infections.

Allergic skin disease can be chronic and may require long-term management.

11.2 Atopic Dermatitis

Canine atopic dermatitis is a common inflammatory skin condition associated with sensitivity to environmental allergens.

Examples include:

House dust mites.
Pollen.
Mould spores.
Other environmental substances.

Affected dogs often experience itching around the paws, face, ears, armpits and abdomen.

Repeated scratching can damage the skin barrier and lead to secondary bacterial or yeast infections.

11.3 Flea Allergy Dermatitis

Some dogs develop an allergic reaction to proteins in flea saliva.

Even a small number of flea bites can cause significant itching in a sensitive dog.

Common signs include:

Intense itching.
Hair loss around the lower back and tail base.
Redness.
Small scabs.
Secondary infection.

Effective flea control is important for affected dogs.

11.4 Mange

Mange is caused by microscopic mites.

Two important forms are:

Demodectic mange

Caused by Demodex mites living in hair follicles and associated skin structures.

It can cause patchy hair loss, redness and scaling.

Some cases remain localised, while others become widespread and may develop secondary infections.

Sarcoptic mange

Caused by Sarcoptes scabiei mites.

It is highly contagious between dogs and causes intense itching.

It can also temporarily affect humans who come into contact with an infested animal.

Veterinary diagnosis and appropriate treatment are essential.

11.5 Ringworm

Despite its name, ringworm is not caused by a worm.

It is a fungal infection affecting the skin, hair and sometimes nails.

Common signs include:

Circular or irregular areas of hair loss.
Broken hairs.
Scaling.
Crusting.
Mild to moderate itching.

Ringworm is contagious and can spread to people and other animals.

11.6 Hot Spots

Hot spots, medically known as acute moist dermatitis, are rapidly developing areas of inflamed, damaged skin.

They may appear suddenly after a dog repeatedly licks, scratches or chews an area.

Possible triggers include:

Fleas.
Allergies.
Ear problems.
Moisture trapped in the coat.
Local irritation.

Hot spots can become painful and may require veterinary treatment.

11.7 Seborrhoea

Seborrhoea is a disorder involving abnormal skin scaling and, in some cases, excessive oil production.

Dogs may develop:

Dry flakes.
Greasy skin.
Unpleasant odours.
Crusting.
Itching.
Hair abnormalities.

Seborrhoea may be primary or secondary to another condition.

11.8 Pyoderma

Pyoderma refers to bacterial skin infection.

It may develop when the normal skin barrier is damaged.

Possible signs include:

Pustules.
Redness.
Crusting.
Circular areas of scaling.
Hair loss.
Itching.

The underlying cause should be identified because infections may recur if the primary problem remains untreated.

11.9 Hormonal Skin Disorders

Certain hormonal conditions can affect skin and coat quality.

Examples include:

Hypothyroidism.
Hyperadrenocorticism (Cushing's syndrome).
Sex hormone-related disorders.

Affected dogs may develop:

Symmetrical hair loss.
Thin or fragile skin.
Changes in pigmentation.
Recurrent infections.
Changes in coat texture.
Reduced hair regrowth.

Hormonal skin disorders require veterinary investigation and appropriate diagnostic testing.

11.10 Colour Dilution Alopecia

Colour dilution alopecia is an inherited hair disorder that can occur in dogs carrying certain coat-colour dilution genes.

It is associated with abnormalities involving pigment distribution within hair follicles.

Affected dogs may develop:

Hair thinning.
Progressive hair loss.
Dry or brittle hair.
Recurrent follicular infections.

It is particularly associated with certain blue and fawn coat colours.

11.11 Sun Damage and Skin Cancer

Dogs can develop sun-related skin damage, especially in areas with little pigmentation or hair coverage.

Prolonged ultraviolet exposure can contribute to certain skin cancers.

Examples include squamous cell carcinoma, which may affect exposed or lightly pigmented areas.

Any persistent skin lesion, unusual growth, non-healing wound or changing lump should be examined by a veterinarian.

12. Seasonal Changes and Shedding

Many dogs experience changes in their coats throughout the year.

These changes are influenced by daylight exposure, temperature, hormones and genetics.

In South Africa, dogs may experience seasonal coat changes associated with the transition between summer and winter.

However, indoor lighting and controlled living environments can make shedding less seasonal in some dogs.

Spring

Some double-coated dogs shed their heavier winter undercoat as temperatures increase.

Summer

The coat may become lighter or less dense, depending on the breed.

Dogs still require protection against excessive sunlight and heat.

Autumn

Some dogs begin developing a denser coat in preparation for colder weather.

Winter

The coat may provide increased insulation, especially in breeds with thick double coats.

Is excessive shedding normal?

Some shedding is normal.

However, bald patches, inflamed skin, broken hairs, persistent itching or sudden excessive hair loss should not be dismissed as ordinary seasonal shedding.

13. Grooming and Maintaining a Healthy Coat

Regular grooming is essential for maintaining the skin and coat.

The appropriate grooming routine depends on coat type, length, density and the dog's lifestyle.

13.1 Brushing

Brushing helps:

Remove loose hair.
Reduce tangles.
Prevent matting.
Distribute natural skin oils.
Remove dirt and debris.
Allow early detection of skin problems.

Different coat types require different brushes.

For example:

Short coats may benefit from soft brushes or grooming gloves.
Long coats often require pin brushes and combs.
Double coats may need suitable undercoat grooming tools.
Curly coats generally require careful brushing and combing to prevent hidden mats.

13.2 Bathing

Bathing removes dirt, excess oil and environmental debris.

However, excessive bathing or the use of harsh products can irritate the skin and damage its protective barrier.

Dogs should be washed using products formulated specifically for canine skin.

Human shampoos are generally unsuitable because canine skin differs from human skin in several physiological respects, including surface characteristics and pH.

The appropriate bathing frequency depends on the individual dog.

13.3 Nail and Paw Care

Although this report focuses on skin and coat, paw care is also important.

Check regularly for:

Cracked paw pads.
Redness between the toes.
Foreign objects.
Excessive licking.
Skin irritation.

The spaces between the toes can be particularly vulnerable to moisture and allergic inflammation.

13.4 Ear Care

The external ear contains skin and hair, and certain breeds are prone to ear-related skin problems.

Regular observation can help identify redness, discharge, odour or excessive scratching.

Avoid inserting cotton buds or other objects deeply into the ear canal.

13.5 Professional Grooming

Some breeds require professional grooming to maintain their coats properly.

This is especially relevant for:

Poodles.
Bichon Frises.
Schnauzers.
Afghan Hounds.
Certain terrier breeds.

Professional groomers can help with trimming, coat maintenance, mat removal and other routine care.

Severely matted coats should be handled carefully because the skin underneath may be damaged or inflamed.

14. Skin and Coat Differences Between Breeds

Different breeds have developed distinctive skin and coat characteristics through selective breeding.

These characteristics can influence grooming requirements, environmental tolerance and susceptibility to certain skin conditions.

Breed	Typical coat	Important considerations
Boerboel	Short, dense coat	Regular brushing and skin inspection.
German Shepherd	Double coat	Significant seasonal shedding.
Siberian Husky	Thick double coat	Careful undercoat maintenance.
Border Collie	Smooth or rough double coat	Regular brushing and mat prevention.
Poodle	Curly coat	Frequent grooming and trimming.
Afghan Hound	Long, flowing coat	Extensive brushing and coat maintenance.
Boxer	Short, smooth coat	Skin sensitivity and sun exposure considerations.
Dachshund	Smooth, long or wire-haired	Grooming requirements vary by variety.
Chinese Crested	Hairless or powderpuff	Particular attention to exposed skin in hairless dogs.
Shar-Pei	Short coat with skin folds	Careful monitoring of skin folds.

Special consideration: Shar-Pei

The Shar-Pei has distinctive skin folds.

These folds can trap moisture, dirt and debris.

If not properly monitored, they may become irritated or infected.

Owners should keep affected areas clean and dry while avoiding excessive washing or rubbing.

15. The Influence of Genetics on Skin and Coat

Genetics plays a major role in determining a dog's skin and coat characteristics.

Genes influence:

Hair length.
Hair texture.
Coat density.
Curliness.
Shedding characteristics.
Pigmentation.
Skin pigmentation.
Hair follicle development.

Some genes also influence inherited skin disorders.

For example, certain genetic variations can be associated with:

Colour dilution alopecia.
Hairlessness.
Abnormal hair growth.
Inherited follicular disorders.
Breed-associated skin disease susceptibility.

Selective breeding has created an extraordinary variety of coats, but it has also contributed to some inherited conditions.

Responsible breeding should consider the health of the skin and coat alongside appearance and breed characteristics.

16. Skin and Coat Health Throughout a Dog's Life

Skin and coat requirements change as a dog ages.

Puppies

Puppies have developing skin and coats.

Their grooming should be gentle, and products should be suitable for young dogs.

Their nutritional requirements must support growth and normal tissue development.

Adult Dogs

Healthy adult dogs generally benefit from consistent grooming, complete nutrition and routine skin examinations.

Changes in coat quality should be investigated rather than automatically attributed to seasonal shedding.

Senior Dogs

Older dogs may experience:

Thinner coats.
Reduced hair density.
Changes in pigmentation.
Dry or less elastic skin.
Slower wound healing.
Increased susceptibility to certain skin conditions.

Some changes are associated with ageing, while others may reflect underlying disease.

A noticeable or sudden change should be assessed by a veterinarian.

17. How to Recognise a Healthy Skin and Coat

A healthy dog's skin and coat generally display several characteristics.

Healthy skin

No persistent redness.
No unexplained swelling.
No excessive scaling.
No unusual odour.
No persistent itching.
No unexplained sores or lesions.

Healthy coat

Appropriate shine and texture for the breed.
No extensive bald patches.
No excessive breakage.
No severe matting.
Normal shedding for the individual dog.
No widespread greasy or flaky appearance.

Healthy behaviour

Normal grooming behaviour.
No constant scratching.
No repeated chewing of paws.
No excessive rubbing against furniture.
No persistent head shaking associated with ear irritation.

A shiny coat is often a positive sign, but appearance alone cannot confirm that a dog is healthy.

A dog may have a beautiful coat while still experiencing an underlying medical problem.

18. Interesting Facts About the Modern Domestic Dog's Skin and Coat

Here are some fascinating facts about canine skin and hair.

1. A dog's skin is an organ.It is a living, active structure with immune, sensory, protective and regulatory functions.

2. Dog hair is made primarily of keratin.The same general structural protein is also found in human hair and nails.

3. Dogs have different hair types.Guard hairs, undercoat hairs and specialised sensory hairs all serve different functions.

4. Whiskers are highly sensitive.They help dogs detect nearby objects and changes in their environment.

5. Raised hackles are an involuntary response.Small muscles attached to hair follicles cause the hairs to stand upright.

6. Not all dogs shed equally.Coat genetics and hair-growth cycles influence how much hair an individual dog loses.

7. Hairless dogs still require skin care.Their exposed skin needs appropriate protection and regular examination.

8. The skin has its own microbiome.Beneficial and harmless microorganisms live on healthy canine skin.

9. Coat colour is genetically controlled.Several genes influence the production and distribution of pigment.

10. Nutrition influences coat quality.Adequate protein, essential fatty acids, vitamins and minerals are necessary for normal skin and hair development.

11. Dogs do not cool themselves like humans.Panting is their primary method of losing excess heat, rather than widespread sweating through the skin.

12. A dog's coat is not simply decorative.It provides insulation, protection and an important part of the animal's interaction with its environment.

19. Practical Guidelines for Maintaining Healthy Skin and Coat

Every dog owner can take practical steps to support healthy skin and coat condition.

Here are twelve important recommendations:

Feed a complete and balanced diet: Ensure the dog's nutritional requirements are met.
Provide sufficient protein: Protein supplies the amino acids needed for skin and hair production.
Maintain appropriate essential fatty acid intake: Omega-3 and omega-6 fatty acids contribute to skin-barrier health.
Ensure adequate hydration: Provide clean drinking water at all times.
Brush regularly: Adapt brushing frequency and equipment to the coat type.
Bathe appropriately: Use canine-specific grooming products and avoid excessive bathing.
Control fleas and parasites: Maintain an appropriate parasite-prevention programme.
Protect against excessive sunlight: Pay particular attention to hairless dogs and exposed, lightly pigmented areas.
Inspect the skin regularly: Look for lumps, redness, sores, parasites and unusual hair loss.
Maintain a healthy body weight: Obesity can make grooming and skin maintenance more difficult.
Avoid unnecessary supplements: Excessive vitamins and minerals can be harmful.
Seek veterinary advice when necessary: Persistent itching, hair loss, skin infections and unusual lesions require proper investigation.

20. Conclusion: More Than Just a Beautiful Coat

The modern domestic dog's skin and coat are remarkable biological structures that play an essential role in its survival, protection and general wellbeing.

Beneath every beautiful coat lies a complex network of living tissues, specialised cells, hair follicles, glands, blood vessels, nerves and immune structures.

The skin protects the body against environmental threats, helps regulate temperature, provides sensory information and contributes to immune defence.

The coat provides insulation, physical protection and, in many breeds, an additional barrier against environmental conditions.

From the short, sleek coat of a Boxer to the thick double coat of a Siberian Husky and the magnificent flowing hair of an Afghan Hound, the diversity of canine coats reflects thousands of years of evolution, adaptation and selective breeding.

However, maintaining a healthy skin and coat requires much more than regular grooming.

Proper nutrition, adequate hydration, parasite prevention, appropriate bathing, environmental protection and routine health checks all contribute to maintaining healthy skin and hair.

A dog's coat is often the first thing we notice, but its skin tells a much bigger story about the animal's health.

By understanding how the skin and coat function, dog owners can recognise potential problems earlier and make better decisions about nutrition, grooming and general care.

Ultimately, a healthy skin barrier and well-maintained coat are not simply about appearance. They are important components of a happy, comfortable and healthy dog.