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Coat and Skin Appearance in the Healthy Dog

The general condition of your dog's skin and coat are good indicators of its health. A healthy coat should be shiny and smooth, not brittle or coarse, and healthy skin should be supple and clear, not greasy, flaky or bumpy. Although health and nutrition influence the luster and texture of your pet's coat from the inside, regular grooming and skin care on the outside will help keep your dog's coat clean and free of tangles, no matter what type of hair coat he or she has.


What are the different types of hair coat that a dog might have?

"Selective breeding has led to the development of dogs with a myriad of different coat characteristics."

Selective breeding has led to the development of dogs with a myriad of different coat characteristics. Some breeds have hair that grows continuously and does not shed. These breeds of dog require regular trips to the 'doggy salon' for a shampoo and cut. Breeds such as huskies, malamutes and many retrievers have long, thick hair coats with both an outer coat of 'guard hairs' and an undercoat of fine hair that serves as an insulating layer. These breeds often go through two heavy seasonal shedding cycles per year (late spring and late fall), during which much of the undercoat falls out in clumps. Many short-haired breeds lack a distinctive undercoat, and these breeds often shed hair in low levels all year round.


How does nutrition influence the appearance of my dog's hair and skin?

coat_and_skin_appearance_in_the_healthy_dog12The skin is the largest organ of the body, and the cells of the skin turn over rapidly. For most pets, virtually all of the skin is covered with hair, which is either being shed regularly or, in non-shedding breeds, is growing constantly. In order to maintain the skin and hair in a healthy state, your dog requires a properly balanced diet that contains highly digestible proteins, carbohydrates, fats, minerals and vitamins, and provides the appropriate number of calories to meet its energy needs.

If the nutrients are poorly digestible, they will not only be unavailable to meet the body's needs, but they will also put an excessive load on the liver and kidneys, which must eliminate the indigestible waste products. The appropriate diet for each pet should be individualized to their specific life stage and needs and in all cases, quality and balance are the keys to good nutrition.

A dog whose diet is inadequate to meet its needs will have a dull, dry hair coat and will often shed excessively. For more information about pet nutrition, we recommend that you read the appropriate handouts in this client education series.


What role does health play in the appearance of my dog's coat and skin?

Illness or stress, especially if it is chronic or long-standing, will affect the appearance of your pet's coat, particularly its luster and texture, and many dogs will shed excessively when they are under stress. Some of the more common examples of diseases that can affect your pet's coat include hormone imbalances or other metabolic problems, digestive disturbances such as chronic diarrhea, parasites, both internal (intestinal worms) and external (fleas, ticks, mange mites), and cancer. Even arthritis or obesity can cause skin problems such as dandruff or matting if the dog is unable to groom itself properly.

Many skin conditions will affect both the shininess and the appearance of your pet's fur. Allergic skin disease and seborrhea cause itching and changes in the normal production of skin oils, resulting in dullness and excessive shedding, either in patches or over the entire body.

If your pet's skin or coat problem is caused by an underlying health issue, the general health of the skin and the quality of the hair often improve dramatically when the illness is brought under control through treatment, which may include dietary changes.


What role does regular grooming play in the appearance of my dog's coat and skin?

"All dogs benefit from regular grooming..."

All dogs benefit from regular grooming to remove loose hairs and dead skin cells, to keep the coat free of dirt, debris, and external parasites, and to distribute natural skin oils along the hair shafts.

 Dogs with long, silky or curly coats require daily brushing to keep their hair from becoming tangled or matted, especially around the ears, in the armpits, or along the back of the legs. Dogs with short hair coats may require less frequent brushing. However, daily brushing of any dog that sheds will cut down dramatically on the amount of loose hair and pet dander floating around the home, and will also cut down on the amount of hair that the dog swallows in the course of self-grooming with its tongue.coat_and_skin_appearance_in_the_healthy_dog1

Regardless of the type of hair coat, you should inspect your dog's coat every day to make sure there are no tangles or clumps that have developed under the armpits, in the groin, or behind the ears. After a romp through the grass or in the woods, it is a good idea to look for burrs or grass awns that might have become trapped in the coat and could potentially cause irritation.

If you regularly check your dog's coat and skin, you will also have a better chance of detecting any unusual lumps, bumps, or areas of sensitivity on your dog's body at an early stage.


How often should I bathe my dog?

"Most dogs require bathing on an occasional basis, usually when their coat becomes dirty or when they develop a 'doggy odor'. "

Most dogs require bathing on an occasional basis, usually when their coat becomes dirty or when they develop a 'doggy odor'. Non shedding breeds that have no health issues usually need to be bathed about every six to eight weeks, at the time of their regular grooming. Dogs that have a heavy undercoat will benefit from bathing in the spring or fall, when they are undergoing their seasonal shedding.

How often your individual dog needs to be bathed will vary somewhat with its age, lifestyle, type of hair coat, and underlying health status as discussed above. If you have a young puppy that is just being house trained and it accidentally soils itself, there is no question that it should be bathed immediately. A dog that enjoys running through puddles or jumping into water may need a bath after a stroll through the mud or a romp in a scum-covered pond. Some dogs enjoy rubbing their head in decomposing debris in the park, or rolling in objectionable objects, and will need a bath whenever this happens so that it is allowed back into the house! Finally, if your dog has allergies, your veterinarian may prescribe frequent bathing as part of the treatment regime - with some of these dogs, daily bathing may be necessary until the problem gets under control.coat_and_skin_appearance_in_the_healthy_dog2

"Dogs should only be bathed in a shampoo that is formulated for use on dogs..."

Dogs should only be bathed in a shampoo that is formulated for use on dogs - their skin has a different thickness and pH than human skin, and human shampoo, including baby shampoo, is too harsh for their skin. For regular bathing, a hypoallergenic shampoo without any added perfumes is the best choice. For best results, a conditioning product should be applied afterwards, to restore any lost moisture to the skin and minimize the development of dandruff after the bath.

If you find that your dog requires frequent bathing, you should discuss this with your veterinarian, who may recommend the use of a special shampoo, conditioning rinse, or 'dry shampoo' so that your furry friend does not develop skin problems associated with the repeated baths.

For specific information about grooming or bathing your dog, see our related handout "Grooming and Coat Care for your Dog".


My dog seems to only have skin or coat problems at specific times of the year. Why is this?

Some dogs may suffer from skin irritation related to dry winter conditions, particularly from lack of humidity in our homes. Other dogs that have allergies to pollens from trees, plants, or grass may develop skin problems during pollen season - this may occur in the spring with tree pollens, or during summer or fall for plant pollen allergies.

If you bathe or groom your dog and the skin or coat problem returns quickly, you should bring him or her to the veterinary clinic for an examination. Sometimes, skin problems such as excessive dandruff, doggy odor, a greasy coat, or excessive shedding can indicate a more serious underlying problem, as discussed above.  Sometimes this problem will be easy to diagnose and treat, but occasionally, the underlying disorder can present a diagnostic challenge and might even require referral to a dermatologist. Once the underlying problem is diagnosed, the appropriate treatment can be prescribed to control your dog's symptoms.

Your take home message is that your pet's general coat appearance may be the first indicator of health problems. A healthy animal will not shed excessively and will have a shiny coat that is free from dandruff or greasiness. Before reaching for the bottle of shampoo, think about whether that lackluster coat could be telling you something else. If you have any concerns, contact your veterinarian for a consultation.

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