Course 14 · Shedding and Undercoat · Lesson 2 of 12

How do you tell normal shedding from a coat problem?

Published 29 October 2026 · Updated 29 October 2026 · About 6 minutes · General information only. This lesson does not diagnose or treat any condition.

Tell normal shedding from a coat problem by looking at pattern, skin, regrowth and behaviour together. Normal shedding is fairly even, skin looks healthy, new hair grows in, and the dog is comfortable and eating normally. A coat problem is often patchy, sudden, or accompanied by red, flaky, sore or smelly skin, bald patches that do not regrow, scratching, licking, or behaviour change. No single sign proves a problem, but a change from the dog’s normal pattern, especially a sudden or patchy change, should prompt veterinary advice rather than more grooming.

What does normal shedding look like over a year?

Normal shedding has a pattern that repeats over the year and that the owner can learn. It may be steady and low level, with seasonal increases in spring and autumn, or it may be a distinct blow in double coated dogs, as in lesson 1. The coat should look fairly even, without bald patches, and the skin should look healthy: no widespread redness, flaking, sores, or smell. The dog should be comfortable, not scratching or licking excessively, and eating, drinking and behaving normally. Hair loss should be matched by regrowth, so the coat does not thin progressively over months. Owners should note the dog’s normal pattern, including seasonal peaks, areas that shed most, and how much hair is found in the home, so change is recognisable. Photographs taken occasionally in good light, from the same angles, can help track coat density over time, but they do not replace a hands on skin check. A dog that sheds heavily but has healthy skin, even coat, and normal behaviour is usually shedding normally, even if the volume of hair surprises a new owner.

Which patterns suggest a coat problem?

Several patterns suggest a problem and need veterinary assessment. Patchy hair loss, with bald spots, thinning in one area, or a symmetrical pattern on both sides, is not normal shedding. Sudden heavy shedding, especially outside seasonal peaks, or shedding that increases steadily over weeks without regrowth, is not normal. Hair loss accompanied by red, flaky, crusty, sore, or smelly skin, by scratching, licking, chewing, or head shaking, or by behaviour change, appetite change, or lethargy, needs assessment. Hair that breaks easily, leaving short, stubby hairs, or a coat that becomes dull, dry, or greasy with a new smell, also deserves attention. Puppies losing coat, older dogs thinning, and dogs after illness or medication may shed differently, but those changes should still be discussed with a vet if they are sudden, patchy, or accompanied by skin signs. Owners should not assume that a coat problem is caused by food, shampoo, or grooming without veterinary input, and should not change diet, add supplements, or use medicated products to test a theory. The vet can examine skin, take samples where needed, and advise on whether a wider health check is needed.

How should owners check coat and skin at home?

Check coat and skin systematically during grooming, in good light, by parting hair in sections and looking at skin, feeling for lumps, heat, tenderness, or texture change, and noting any bald patches, flaking, or sores. Work over the whole body, including belly, legs, tail base, ears and face, because problems can start in hidden areas. Use a comb to part hair and to remove loose hair, so skin is visible. Note findings in plain words, with date and location, and compare with previous checks. Do not squeeze, scrape, or apply products to abnormal skin, and do not try to diagnose from appearance alone. Many skin and coat conditions look similar, and only veterinary examination, sometimes with skin scrapings, blood tests, or other tests, can distinguish them. Home checks are valuable because they catch change early and provide a clear history for the vet, not because they can identify a cause. If a check finds a sudden or worrying change, contact the vet practice promptly for advice on urgency, rather than waiting for the next routine groom.

What should owners avoid when they suspect a coat problem?

Avoid changing food repeatedly, adding supplements, using medicated or human shampoos, applying creams, oils or home remedies, and increasing bathing or brushing forcefully. These actions can irritate skin, obscure signs, and delay proper assessment. Avoid assuming that shedding is caused by a single factor, such as diet, without evidence, and avoid online diagnoses based on photographs alone. Avoid grooming a sore or broken skin area, and avoid pulling out loose hair in a patchy area to see if it regrows. If the dog is scratching or licking, prevent further self trauma by supervision and by contacting a vet, rather than by covering the area with clothing or bandages without advice. Keep the dog’s routine, diet and grooming consistent while waiting for veterinary advice, so the vet sees the dog as it normally is, and bring notes on onset, pattern, diet, medication, and any recent changes in environment or products.

When should you stop and get help?

Contact a vet promptly if hair loss is patchy or sudden, if bald patches do not regrow, if skin is red, flaky, sore, broken, discharging or smelly, if the dog scratches, licks or shows pain, or if appetite, behaviour or general health changes. Seek same day advice if the dog is unwell, has widespread skin disease, swelling, or a wound. Do not attempt to treat a coat problem at home with grooming products, supplements or diet changes. Normal shedding is even, seasonal and accompanied by healthy skin and a comfortable dog; anything outside that pattern is a veterinary question, and early assessment gives the simplest path to a plan.

Even pattern, healthy skin, steady regrowth and normal behaviour point to normal shedding, while patchy, sudden or sore change points to a vet, and the home check is what tells the two apart.

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