Why your dog keeps getting ear infections (the honest version)

Naja Yehia
Honest Guides  ·  Dog Health

Dog Ear Infections, Honestly Explained

Tuesday: bath, tidy, blow dry. Friday: a photo of a red, smelly, sore ear and the unspoken question.

The question every owner asks

"It was the bath, right?"

Tap for the honest answer
The honest answer

Almost never.

The bath is the trigger, not the cause. The infection started weeks earlier, sitting quietly under the surface, waiting for something to push it over the edge.

Tap to flip back
01

How a dog's ear is actually built

Before you can understand why dogs get ear infections, you have to understand what makes their ears different from yours. Tap any number on the diagram below.

Cross section of a dog's ear showing the L shaped canal, eardrum, and pinna

Tap any number to see what it is and why it matters.

1
The ear flap (pinna)
The outer flap of the ear. In floppy eared breeds (most spaniels, retrievers, hounds, oodle crosses) the pinna sits down over the canal opening, trapping warmth and moisture. In erect eared breeds (border collies, huskies, chihuahuas) the pinna stands up and lets air flow freely. This is the single biggest difference between high and low risk breeds.
A dog's ear is not a passive tube. It is warm, moist, glandular skin folded into a one way trap, and that is true whether the ears are floppy or erect.
02

Quick symptom check

Catching an ear infection in the first 48 hours can be the difference between a single course of drops and a chronic case that takes months to resolve. Tap any symptoms you have noticed in your dog. The result updates as you go.

0 symptoms selected

No symptoms reported
Tap any symptoms above to see what they likely mean and what to do next.
03

Find your dog's risk profile

The biggest study ever done on this followed 22,333 UK dogs in primary care for a year. 7.3 percent developed an ear infection in that single year, making it the most common medical issue in dogs full stop. Here is where your dog sits.

Pick your dog's ear shape
Floppy / pendulous
Basset, Cocker, Cavalier
V shaped drop
Labrador, Golden, Cavoodle
Erect / pricked
Border Collie, Husky, Chihuahua
1.0×
Risk vs an average crossbreed

Chihuahua
0.20×

Your dog
1.0×

Basset Hound
5.87×
Lowest risk Highest risk

Drag the pink marker along the line to see where specific breeds sit

Pick an ear shape to see your dog's profile Your result will appear here with a personalised note on what the risk level means in practice.
Important nuance

Ear shape is a predisposing factor, not a cause. It makes the environment more friendly to infection. It does not, on its own, cause one. A floppy eared dog with no underlying skin or allergy issue can go a lifetime without a single ear infection. We see this every week.

04

The groomer myth, said plainly

A bath does not cause an ear infection in a dog with healthy ears. Almost every flare blamed on the groomer was actually triggered by one of these six things, and the trigger is never the cause.

💧
Water Bath, swim, rain, humid air
🥩
Diet New food, treats, scraps
🌡️
Environment Heat, cold, humidity, dust
😰
Stress Kennel, visitors, schedule
🌿
Allergens Pollen, dust mites, fleas
✂️
The groom Bath, dryer, plucking

Things groomers can occasionally get wrong

In the interest of being honest in both directions, here is the short list. None of these will cause an infection in a dog with healthy ears, but they are worth knowing about.

✂️

Plucking ear hair when there is no infection

Tap to read more
+

Modern veterinary dermatology consensus is to leave ear hair alone unless it is a clinical problem. Plucking creates microscopic tears that can light up an already inflamed ear.

💨

Forced air drying directly into the canal

Tap to read more
+

A good groomer angles airflow across the ear, not into it. High pressure air aimed straight down the canal stirs up debris and can be uncomfortable.

🧪

High alcohol or homemade ear cleaner

Tap to read more
+

Alcohol heavy products dry the canal too aggressively and strip the natural protective oils. Reputable salons use vet recommended cleaners only.

👂

Cotton tips pushed deep into the canal

Tap to read more
+

No professional groomer should be doing this. It pushes wax deeper and can cause damage. Cotton wool on the visible part of the ear flap only.

05

What actually causes ear infections

Veterinary dermatologists divide the causes into four tiers. Knowing which tier you are dealing with is the difference between treating a symptom and actually fixing the problem.


01
Primary cause
The actual disease

02
Predisposing
Raises the risk

03
Secondary infection
The visible flare

04
Perpetuating
Why it gets stuck

Tap any stage to read more about it

The disease driving inflammation

Most often allergies (atopic dermatitis or food allergy), behind 43 to 75 percent of recurring cases. Also mites (mainly puppies), grass seeds (Australian summers), thyroid disease, and autoimmune conditions. This is the layer everyone skips, and it is the answer to recurring infections.

The honest takeaway

Three or more ear infections in 12 months means the answer is not stronger drops, it is finding the primary cause. In Australia that means an allergy workup, a thyroid panel for older dogs, and a careful check for grass seeds.

Grass seed alert

Sudden head shaking within 48 hours of walking through long grass is a vet today situation. Spear Grass, Barley Grass, and Wild Oats produce barbed seeds that travel one way only. They do not work themselves out and can perforate the eardrum.

06

Prevention that actually works

Most prevention advice on the internet is either harmless or actively counterproductive. Here is the version we give clients at the salon. Tap any card to read the detail.

Do this

Address the underlying cause

Tap for the how →

Address the underlying cause

If your dog has flared more than twice, stop treating ears in isolation. Get an allergy workup. The highest impact thing you can do for a recurrent ear dog.

Dry the ears after wet activity

Tap for the how →

Dry the ears after wet activity

A clean, dry cotton pad gently wiped around the visible part of the canal after every bath or swim. Do not push anything deep, just absorb surface moisture from the entrance.

Use a vet recommended cleaner weekly

Tap for the how →

Use a vet recommended cleaner weekly

For high risk dogs. Squirt into the canal, massage 15 seconds, let the dog shake, wipe out with cotton wool. That is the entire process.

Weekly 30 second ear check

Tap for the how →

Weekly 30 second ear check

Lift the ear flap, look at the visible canal, smell it. 30 seconds, once a week. Catches almost every infection in the first 48 hours.

Check after grass walks

Tap for the how →

Check after grass walks

Spring and summer especially. A seed caught in fur is harmless. A seed in the canal is an emergency. Sudden head shaking after long grass means a vet today situation.

Keep grooming on a regular schedule

Tap for the how →

Keep grooming on a regular schedule

A well groomed dog has trimmed hair around the ears, clean canals, and a professional spotting early signs you might miss between vet visits.

Do not do this

Cotton tips inside the canal

Tap for the why →

Cotton tips inside the canal

They push debris deeper and can damage the eardrum. Cotton wool on the visible part of the ear flap only, never inside the canal itself.

Cleaning ears that look and smell normal

Tap for the why →

Cleaning normal ears

Over cleaning strips the natural protective oils and can actually trigger inflammation. If they look and smell normal, leave them alone.

Plucking ear hair preventively

Tap for the why →

Plucking ear hair preventively

Pluck only if your vet specifically advises it. Microtrauma from plucking can light up an inflamed ear and accelerate a flare.

Vinegar, peroxide, olive oil, home remedies

Tap for the why →

Home remedies

Vinegar, hydrogen peroxide, olive oil, garlic mixes. These either burn an inflamed canal, encourage bacterial growth, or both. None are safe for an actively inflamed ear.

Skipping the vet

Tap for the why →

Skipping the vet

The wrong medication, or the right medication used too long, drives bacterial resistance and sets up chronic disease. A skipped recheck is the single most common reason flares come back.

07

Frequently asked questions

Can I get my dog groomed if they have an ear infection?

It depends on severity. A mild, recently diagnosed infection that is being actively treated is usually fine for a careful groom, with the ear protected and not flushed. A severe, painful, actively flaring infection should wait until the dog has finished treatment. Always tell your groomer in advance. At Dog Love we adjust the bathing approach for any dog with a known ear issue, and we will reschedule rather than aggravate an actively painful ear.

Should I pluck the hair out of my dog's ears?

Modern veterinary dermatology consensus is to leave ear hair alone unless it is causing a clinical problem. Plucking creates microscopic tears in the canal lining, and in an already inflamed ear it can accelerate a flare. The old groomer rule of plucking every dog every visit is outdated.

What is the best ear cleaner for dogs?

For routine maintenance in a healthy dog, vets in Australia commonly recommend Epi Otic Advanced, PAW Gentle Ear Cleaner, or similar pH balanced drying cleaners. For active infections, your vet will prescribe a specific medicated product matched to whether the infection is yeast, bacterial, or both. Avoid anything containing high alcohol, hydrogen peroxide, or vinegar as a primary ingredient.

How often should I clean my dog's ears?

For a low risk dog with normal ears, almost never. A monthly check is usually enough. For a high risk dog (floppy eared, frequent swimmer, or one that has had a previous infection), once a week with a drying cleaner is reasonable. Daily cleaning is not necessary, even after a swim. Drying the ear surface with cotton wool is enough.

Is swimming bad for my dog's ears?

For a dog with no underlying ear issue, swimming is fine as long as the ears are dried properly afterwards. For a dog with a history of ear infections, swimming is one of the strongest known triggers, and these dogs benefit from a drying ear cleaner used after every swim. The water is a trigger, not a cause.

How much does ear infection treatment cost in Australia?

A first time, uncomplicated ear infection in a general practice clinic in Adelaide typically runs in the range of $150 to $300, including consult, cytology, and medication. A chronic or recurrent case can easily run into the thousands across multiple consults, repeat medications, allergy workups, and possibly specialist referral. This is the financial argument for treating the underlying cause once, properly.

My dog gets an infection every time after grooming. Is the groomer doing something wrong?

Almost certainly not. As covered above, a bath does not cause an ear infection in a dog with healthy ears. If your dog flares every time, your dog has an underlying chronic issue (most often allergies) and the groom is one of several possible triggers. Switching groomers will not fix it. An allergy workup will.

Can ear infections cause permanent damage?

Yes, if untreated or repeatedly mistreated. Chronic inflammation causes the canal walls to thicken and narrow (stenosis). Ruptured eardrums can lead to middle ear involvement, balance issues, and in severe cases hearing loss. Some end stage cases require surgical removal of the ear canal (TECA). All preventable by treating the underlying cause early.

Worried about your dog's ears?

If you are in Adelaide and your dog is overdue for a groom, or if you have noticed early signs and want a second pair of eyes, book a visit. We check ears as part of every appointment and we will tell you honestly what we see.

Book a grooming visit
Research and references O'Neill DG et al. Frequency and predisposing factors for canine otitis externa in the UK, a primary veterinary care epidemiological view. Canine Medicine and Genetics, 2021. RVC VetCompass.  ·  Saridomichelakis MN, Farmaki R, Leontides LS, Koutinas AF. Aetiology of canine otitis externa: a retrospective study of 100 cases. Veterinary Dermatology, 2007.  ·  Paterson S. Discovering the causes of otitis externa. In Practice (BVA), 2002.  ·  Hicks A et al. Epidemiological investigation of grass seed foreign body related disease in dogs of the Riverina District of rural Australia. Australian Veterinary Journal, 2016.  ·  Koch SN. The Challenge of Chronic Otitis in Dogs. Today's Veterinary Practice, 2022.  ·  Merck Veterinary Manual: Otitis Externa in Animals.

 

 

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