How to get rid of fishy smell from dog?

Dogs develop strange smells from time to time, and a fishy odor is one of those scents that gets owners’ attention fast — it can make a living room uncomfortable for visitors, spoil a walk when people recoil, or make you worry about a new puppy or a senior pup who isn’t grooming well. Most people want their home to smell clean, to be able to invite guests without embarrassment, and to know their dog is healthy; a lingering fishy scent often threatens all three and prompts a quick search for answers.

Fast relief: immediate steps to neutralize a fishy dog odor

If your dog smells fishy, first narrow down where the odor comes from (ears, coat/skin, mouth, or rear) and treat that area quickly: wipe the area with a damp cloth and a mild, dog-safe cleaner, dry thoroughly, use an odor-neutralizing spray designed for pets if needed, and do a single, gentle ear clean with a vet-approved solution if the ears seem involved. If the smell is strong and persistent, there is pain, swelling, discharge, or your dog seems unwell, seek veterinary care without delay — those signs may mean an infection or other condition that needs professional treatment.

What’s causing that fishy scent? Common medical and non-medical explanations

A fishy odor in dogs most often ties back to biological breakdown of natural substances. Skin produces oils that help protect the coat; when those oils mix with bacteria and yeast on the skin they may break down and generate sharp, tangy smells that some people describe as fishy. The ears contain waxy secretions and a warm, humid space where yeast and bacteria can overgrow; that mix can smell particularly pungent. Anal glands naturally produce a strong-smelling secretion that is part of normal scent signaling but can become foul if impacted or infected. Finally, bacteria in the mouth related to dental disease can produce halitosis that some owners interpret as a fishy smell. In practice I typically see one of these sources driving the odor rather than a mysterious whole-body problem, though more than one area can be involved at once.

When the smell shows up — typical triggers and situations

Several everyday events tend to make a fishy odor show up more clearly. Dogs that swim in ponds, lakes, or stagnant water can pick up algae, fishy organic matter, or lingering pungent compounds; rolling in a dead animal or wet vegetation deposits external odors on the coat. Diet changes — especially introduction of fish-based foods or high-dose omega supplements — may slightly alter body odors for some dogs. Warm, humid weather and inadequate drying after a bath or swim favor yeast and bacterial growth, which can amplify odors. Finally, infrequent grooming or underlying skin conditions that increase oil production and debris will allow odors to build over time.

Red flags to watch for: signs that need prompt veterinary attention

A quick wipe or bath may fix a transient smell, but certain findings suggest you should see a veterinarian sooner rather than later. If the odor persists or worsens despite cleaning, or if you notice pain, obvious swelling, redness, a foul discharge, or bleeding around the ears, mouth, or rear, arrange veterinary care. Systemic signs — fever, lethargy, loss of appetite, or any change in behavior — point away from a simple surface smell and toward infection or systemic illness. Recurrent or rapidly spreading skin lesions, or repeated anal gland problems, also benefit from professional evaluation and possibly culture, imaging, or targeted medication.

Hands-on care for owners: practical actions you can take right away

1. Find the source: work methodically in a clean, well-lit space. Check ears for wax or dark discharge, lift the tail to inspect the rear for smegma or swollen glands, smell along the flanks and under the collar area, and open the mouth to check teeth and gums for heavy tartar or rotten-smelling pockets. I advise doing this with a helper for fidgety dogs.

2. Clean the site: for skin/coat problems, use a gentle, degreasing dog shampoo and warm water; rinse thoroughly and towel-dry. For ears, only use a veterinarian-recommended ear cleaner and cotton or gauze — do not insert cotton swabs deep into the ear canal. For the mouth, brush teeth with a canine toothbrush and enzymatic toothpaste if your dog tolerates it; a single professional dental assessment may be needed if dental disease is suspected.

3. Address anal gland complaints cautiously: if you only notice odor without pain or swelling, a warm compress followed by gentle perineal cleaning can help. Do not attempt forceful or deep expression if you are not trained; that can cause trauma. If the glands feel hard, swollen, or your dog shows pain, bring them to the clinic for safe expression and assessment.

4. Use short-term neutralizers wisely: pet-safe odor neutralizers can mask smells for a while, but they don’t treat the cause. After cleaning and drying, a light spray formulated for dogs can help while you monitor for recurrence.

5. Record what you did and what changed: note the date, treatments used, and any improvement or decline. If the smell returns within a few days or the area worsens, call your veterinarian and bring your notes; this speeds diagnosis and avoids unnecessary treatments.

Fixing the setup: home and training adjustments to prevent recurrence

Cleaning the dog is only part of the solution; environment and behavior shape how often odors come back. Wash bedding, crates, and blankets in hot water and an enzymatic laundry additive to remove organic residues, and clean floors and upholstery with pet-safe enzymatic cleaners. Limit access to carcasses, stagnant ponds, and farm fields where dogs commonly find smelly treasures; a leash is a simple prevention tool. After any water exposure, dry the dog thoroughly — use absorbent towels and, for thick coats, a low-heat blow-dry routine until the skin is dry. Trim long hair around the ears, tail, and rear to reduce moisture trapping. Finally, teaching reliable recall and a solid “leave it” cue will prevent many rolling-in-events and keep your dog out of the smelly stuff in the first place.

Grooming tools and products worth trying (and what to avoid)

Keep a small kit on hand: a pH-balanced, degreasing dog shampoo and an occasional clearing shampoo for greasy coats; a veterinarian-recommended ear cleaner and soft cotton pads for safe external cleaning; a canine toothbrush with enzymatic toothpaste or dental wipes to reduce oral bacteria; quality dental chews for daily support (not a substitute for brushing); enzymatic fabric cleaners for bedding and carpets; several thick, absorbent microfiber towels; and a robust vacuum for hair and debris. I often suggest owners buy pet-specific products labeled for skin and ear use rather than human products, because they tend to have gentler pH and fewer irritants. If you have a dog that tolerates it, a short consultation with your vet about appropriate supplements is worth doing before starting fish oils or other strong-odored additives, as those can change body scent for some animals.

Realistic outcomes: what to expect and when to follow up

After a targeted cleaning and short-term care, many temporary odors resolve within 24–72 hours. If the smell improves but does not fully disappear, or if it returns, expect your veterinarian to look for underlying causes: otitis externa (ear infection), yeast or bacterial skin disease, impacted or infected anal glands, or dental disease. Treatment may include topical or oral antimicrobials, medicated baths, professional dental cleaning, or gland expression and occasionally minor procedures. With correct diagnosis and a short treatment course, most dogs return to normal and the fishy smell does not become a chronic problem.

How vets can help: tests, treatments, and when a visit is likely to make a difference

Book an appointment promptly when cleaning and a simple at-home plan do not reduce the odor, or when you notice additional signs like pain, swelling, discharge, systemic illness, or repeated episodes despite proper grooming. A veterinary exam may include an ear cytology, skin cytology or culture, dental assessment with x-rays, or evaluation of the anal glands. These tests help target treatment so you avoid repeated, ineffective interventions and get your dog comfortable faster.

Sources, studies, and further reading

• Merck Veterinary Manual: Anal Sac (Anal Gland) Disease in Dogs and Cats
• American Veterinary Medical Association (AVMA): Client education on ear infections (otitis) in dogs
• American College of Veterinary Dermatology (ACVD): Owner resources on canine skin infections and yeast
• Veterinary Dermatology (journal): Reviews on the canine skin microbiome and its role in skin disease
• Journal of Veterinary Dentistry: Guidance on periodontal disease and halitosis in dogs