Do Dogs Stink While Losing Their Coat? Understanding the Odor Factor

Disclaimer: This article is for general educational purposes and is not a substitute for professional veterinary advice. Contact your veterinarian if your dog develops a sudden, strong, persistent, or unusual odor.

Dogs naturally shed old or damaged hair as their coats grow and change. Seasonal shedding can release large amounts of loose fur, especially in double-coated breeds.

However, shedding itself does not normally create a strong or foul odor. The smell that becomes noticeable during shedding season is usually caused by oils, moisture, dirt, dead skin, bacteria, yeast, or another health issue trapped in or beneath the loosening coat.

Regular brushing, appropriate bathing, coat drying, and skin checks can control many mild odors. A persistent fishy, sour, musty, rotten, or unusually strong smell should be evaluated because it may indicate an infection or another medical problem.

Does Shedding Make Dogs Smell?

Normal shedding should not make a healthy dog smell strongly. The shedding process can make an existing odor more noticeable because loose fur and undercoat may hold:

• Natural skin oils
• Dead skin cells
• Dirt and dust
• Moisture
• Saliva
• Outdoor debris
• Bacteria or yeast

When a thick undercoat loosens, these materials may remain close to the skin until brushing or bathing removes them.

A mild “doggy” smell after outdoor activity or getting wet can be normal. A strong or persistent odor is not something to dismiss as ordinary shedding.

Why Do Dogs Shed?

Shedding is the natural process of replacing old, damaged, or unnecessary hair. The amount and timing vary according to breed, coat type, season, health, age, nutrition, and living environment.

Seasonal Shedding

Many double-coated breeds shed heavily when the seasons change. They may release a thicker winter undercoat as temperatures rise and grow a denser coat again before colder weather.

Year-Round Shedding

Dogs that spend most of their time indoors may shed throughout the year because artificial heating and lighting reduce the effect of natural seasonal changes.

Coat and Breed Differences

Short-haired dogs can shed heavily even though the loose hair is less visible. Long-haired and double-coated dogs may develop compacted undercoat if they are not brushed regularly.

Shedding vs. Abnormal Hair Loss

Normal shedding generally occurs across the coat without creating inflamed skin or obvious bald patches.

Hair loss accompanied by itching, sores, redness, odor, flaking, or bald areas may be related to:

• Allergies
• Fleas or mites
• Skin infection
• Hormonal disease
• Poor nutrition
• Excessive licking
• Another medical condition

Common Causes of Dog Odor During Shedding

1. Oil and Dead Skin Buildup

A dog’s skin produces natural oils that help protect the skin and coat. Loose hair can trap these oils along with dead skin cells.

If the dog is not brushed regularly, the coat may begin to feel greasy and develop a stronger smell.

2. Trapped Moisture

A dense or compacted coat can hold moisture after swimming, bathing, rain, or walking through wet grass.

Warm, damp areas close to the skin create favorable conditions for bacterial and yeast growth. This may produce a musty, sour, or stale odor.

3. Dirt and Outdoor Debris

Loose fur can collect soil, pollen, dust, plant material, and other debris. Dogs that roll, swim, hike, or spend time outdoors may smell more strongly during heavy shedding periods.

4. Bacterial or Yeast Skin Infection

A strong, musty, sour, or unpleasant odor may indicate a skin infection rather than ordinary shedding.

Additional warning signs may include:

• Red or darkened skin
• Greasy coat
• Flaking or crusting
• Hair loss
• Constant scratching
• Licking or chewing
• Skin sores
• Thickened skin

Bacterial and yeast infections require veterinary diagnosis and appropriate treatment.

5. Allergies

Environmental or food allergies can contribute to itching, inflammation, excess oil production, and secondary skin infections.

A dog with allergies may lick its paws, scratch its ears, rub its face, or develop recurring skin odor.

6. Matted or Compacted Undercoat

Compacted fur blocks airflow and holds oil, moisture, and debris against the skin. This is especially common in thick double coats during seasonal shedding.

Severe matting may also pull on the skin and hide sores, parasites, or infection.

7. Wet-Dog Odor

Water releases odor-producing compounds from microorganisms and natural materials already present on the skin and coat. The smell becomes more noticeable while the coat is damp.

A properly cleaned and fully dried dog should not continue to smell strongly once dry.

8. Ears, Mouth, or Anal Glands

Not every odor comes from the coat. Shedding season may simply be the time when an owner notices another problem.

Possible sources include:

• Ears: Yeast or bacterial infections may create a strong, sweet, or musty smell.
• Mouth: Dental disease may cause persistent bad breath.
• Anal glands: Impacted or leaking glands often produce a strong fishy odor.
• Paws: Moisture, allergies, or yeast may cause a corn-chip-like or musty smell.

Normal Dog Odor vs. a Warning Sign

How to Reduce Dog Odor During Shedding Season

1. Brush Regularly

Brushing removes loose fur, dead skin, dirt, and debris before they accumulate close to the skin. It also helps distribute natural oils across the coat.

Choose a tool suited to your dog’s coat:

• Rubber grooming brush for short coats
• Slicker brush for medium or long coats
• Undercoat rake for double-coated breeds
• Wide-tooth comb for feathered or long hair

Brush gently and stop if the skin becomes red or irritated.

2. Bathe With a Dog-Safe Shampoo

A bath can remove loose hair, oil, dirt, allergens, and odor. Use lukewarm water and a shampoo formulated specifically for dogs.

Rinse thoroughly because shampoo residue may irritate the skin and contribute to itching or odor.

Learn more about how often to bathe a dog.

3. Dry the Coat Completely

Drying is especially important for dogs with thick or double coats. A coat that feels dry on the surface may still be damp near the skin.

Use towels and cool or low-warm airflow. Avoid directing high heat onto the skin.

4. Spot-Clean Dirty Areas

Clean the paws, belly, rear end, and skin folds when they become dirty. Use a damp cloth or a pet-safe wipe and dry the area afterward.

Avoid heavily fragranced human wipes, household cleaners, or products containing alcohol or essential oils.

5. Wash Bedding and Grooming Tools

A clean dog can quickly smell again after lying on dirty bedding.

Regularly wash:

• Dog beds
• Blankets
• Crate pads
• Harnesses
• Collars
• Brushes and combs

Allow everything to dry fully before use.

6. Check the Ears and Paws

Inspect the ears for redness, discharge, head shaking, or odor. Check between the toes for moisture, redness, swelling, or excessive licking.

Do not place cleaning products into the ears unless your veterinarian recommends them.

7. Use Pet-Safe Deodorizing Products Carefully

A dog-safe deodorizing spray may temporarily freshen a healthy coat between baths. It should not be used to cover a persistent medical odor.

Choose a product specifically made for dogs and follow the label instructions. Review these tips on choosing and using dog deodorizing products.

8. Support Skin and Coat Health

A complete and balanced diet supports normal skin and hair growth. Some dogs with diagnosed skin conditions may benefit from veterinarian-recommended fatty-acid supplements or therapeutic diets.

Do not add supplements solely to treat odor without discussing the underlying cause with your veterinarian.

How Often Should You Brush a Shedding Dog?

The ideal frequency depends on coat type and shedding intensity.

Use the coat’s condition as your guide. Loose clumps, matting, compacted undercoat, or increased odor usually mean the dog needs more frequent grooming.

How Often Should You Bathe a Shedding Dog?

There is no single bathing schedule that works for every dog. Frequency depends on coat type, lifestyle, skin health, medical conditions, and the shampoo used.

Bathing too often with a harsh product can dry or irritate the skin. Bathing too infrequently may allow oil, allergens, and debris to accumulate.

Your veterinarian or groomer can recommend a suitable schedule, especially if your dog has:

• Allergies
• Recurring skin infections
• Very oily skin
• Dry or flaky skin
• A medicated shampoo prescription

When to See a Veterinarian

Schedule a veterinary examination if the odor is sudden, strong, persistent, or accompanied by other symptoms.

Warning signs include:

• Red, inflamed, or darkened skin
• Greasy or sticky coat
• Bald patches
• Excessive scratching
• Constant paw licking
• Open sores or scabs
• Ear discharge or head shaking
• Fishy odor from the rear end
• Persistent bad breath
• Swelling or pain
• A foul-smelling wound
• Behavior or appetite changes

Do not repeatedly bathe or cover the smell with fragrance if an infection is possible. This may irritate the skin and delay appropriate treatment.

The Bottom Line

Dogs may smell more noticeable during shedding season, but the loose hair itself is not usually the direct cause. Natural oils, dead skin, dirt, moisture, compacted undercoat, allergies, and infection are more common explanations.

Regular brushing, appropriate bathing, complete drying, clean bedding, and routine skin checks can manage most mild coat odors.

A strong, sour, musty, fishy, rotten, or persistent smell is not something to ignore. When odor occurs with itching, redness, hair loss, discharge, pain, or sores, contact your veterinarian.

Frequently Asked Questions

Do dogs naturally smell more when they shed?

They may smell more noticeable because loose fur traps oil, dirt, dead skin, and moisture. Strong odor is not considered a normal result of shedding alone.

Why does my dog smell musty during shedding season?

A musty smell may come from damp undercoat, yeast overgrowth, dirty fur, allergies, or a skin infection. Persistent musty odor should be evaluated by a veterinarian.

Will brushing reduce my dog’s odor?

Yes. Brushing removes loose hair, dirt, debris, and dead skin while helping distribute natural oils. It may not resolve odor caused by infection or another medical problem.

How often should I brush my dog while it is shedding?

Short-coated dogs may need brushing once or twice a week, while long-haired or double-coated dogs may need brushing several times per week or daily during heavy shedding.

Can I bathe my dog more often during shedding season?

An occasional extra bath with a mild dog shampoo may help, but over-bathing can irritate the skin. Ask your veterinarian or groomer about the correct schedule for your dog.

Why does my dog still smell after a bath?

The coat may not be fully dry, shampoo may not have been rinsed out, or the odor may come from the ears, mouth, paws, anal glands, or a skin infection.

Is a fishy smell caused by shedding?

No. A fishy smell commonly comes from anal gland secretions and should be assessed if it is strong, recurring, or accompanied by scooting or licking.

Can a yeast infection make a dog smell?

Yes. Yeast overgrowth may create a strong musty or sour odor and can occur with greasy skin, itching, redness, and darkened skin.

Can diet affect a dog’s skin and coat odor?

Nutrition influences skin and coat health, but odor alone should not be treated by changing food or adding supplements without investigating allergies, infection, or another cause.

Can I use human deodorant or perfume on my dog?

No. Human fragrances may irritate the skin or contain ingredients that are unsafe when licked. Use only products made specifically for dogs.

When should I call a veterinarian about my dog’s smell?

Contact a veterinarian if the odor is sudden, severe, persistent, or accompanied by itching, redness, discharge, sores, hair loss, pain, ear problems, or behavior changes.