Dog Ear Infections: Symptoms, Treatment, and Prevention

If your dog is shaking their head, pawing at one ear, or you've noticed a funky smell coming from somewhere around their face, there's a decent chance you're dealing with an ear infection. It's one of the most common health issues in dogs, and if you've never experienced it before, it can look pretty alarming.

The reassuring part? Ear infections are very treatable when caught early. Let's walk through what to look for, what causes them, and, most importantly, how to prevent them from coming back.

How to Recognize an Ear Infection

Dogs can't tell you their ear hurts, but they'll show you in pretty obvious ways. Watch for these symptoms:

• Head shaking or tilting, persistent, not just the occasional shake after waking up
• Scratching or pawing at the ear, sometimes hard enough to cause redness or scratch marks
• Redness or swelling, the ear flap or inner ear canal looks inflamed
• Discharge, can be dark brown, yellow, or bloody depending on the type of infection
• Odor, a yeasty, sweet, or foul smell coming from the ear
• Pain when touched, pulling away, whimpering, or snapping when you reach for their ear
• Loss of balance or coordination, this can indicate the infection has spread deeper (see vet immediately)

What Causes Ear Infections?

Most ear infections in dogs are caused by one of three things: bacteria, yeast, or a combination of both. But the underlying question is: why did the infection start in the first place? Common contributing factors include:

Moisture

The ear canal is warm and dark. Add moisture, from swimming, bathing, or even humid weather, and you've created the perfect environment for bacteria and yeast to multiply. Breeds that love water (like Golden Retrievers and Labradors) are especially prone.

Ear Shape

Dogs with floppy, heavy ears (Basset Hounds, Cocker Spaniels, Beagles) are more susceptible because the ear flap traps warm, moist air inside the canal. Dogs with narrow ear canals (like Shar-Peis) face similar challenges.

Allergies

This is actually one of the most common underlying causes. Dogs with food allergies or environmental allergies (pollen, dust mites) often show their first symptoms through chronic ear infections. If your dog gets recurrent ear infections, your vet may recommend allergy testing.

Other Causes

• Foreign bodies, grass seeds or foxtails can lodge in the ear canal
• Ear mites, more common in puppies, produces dark, crumbly discharge
• Hormonal conditions, hypothyroidism and Cushing's disease can predispose dogs to ear infections
• Over-cleaning, ironically, cleaning the ears too aggressively or too often can disrupt the natural protective barrier

Treatment

Ear infections require a vet visit for proper diagnosis. Your vet will look inside the ear with an otoscope, take a swab to identify whether the infection is bacterial, fungal, or both, and check for any underlying issues.

Typical treatment includes:

1. Professional cleaning, your vet will flush the ear canal to remove debris and discharge, giving the medication a clean surface to work on
2. Topical medication, ear drops containing antibiotics, antifungals, and/or anti-inflammatory agents, applied once or twice daily for 7-14 days
3. Oral medication, for more severe or chronic infections, oral antibiotics or antifungals may be prescribed
4. Pain relief, if your dog is in significant discomfort, your vet may prescribe anti-inflammatory medication

The most critical part of treatment is completing the full course of medication. Even if your dog seems better after a few days, stopping early allows resistant bacteria to survive and the infection to come roaring back, often worse than before.

Prevention: Keeping Ears Healthy

Most ear infections are preventable with consistent, gentle ear care. Here's what works:

Regular Inspection

Make it a habit to look at your dog's ears once a week. A healthy ear should be pale pink inside, with no visible discharge and no strong odor. The more familiar you are with what "normal" looks like, the faster you'll notice when something's off.

Proper Cleaning

Use a vet-recommended ear cleaning solution, not water, hydrogen peroxide, or alcohol (all of which can irritate or damage the ear canal). Here's the right technique:

1. Squeeze enough cleaning solution into the ear to fill the canal
2. Massage the base of the ear gently for 20-30 seconds
3. Let your dog shake
4. Wipe away any visible debris with a cotton ball (never insert cotton swabs into the ear canal)

Most dogs with healthy ears only need cleaning every 2-4 weeks. Dogs prone to infections may benefit from weekly cleaning, ask your vet for a personalized schedule.

Dry Ears After Water Exposure

After swimming or bathing, gently dry the outer ear with a soft towel and consider using a drying ear solution to wick moisture from the canal. This single step prevents a huge percentage of moisture-related ear infections.

Address Allergies

If your dog has recurring ear infections (three or more per year), talk to your vet about allergy testing. Treating the underlying allergy, whether through diet changes, medication, or immunotherapy, can break the cycle of chronic ear problems.

For more on keeping your dog healthy, check out our guides on dental health and everyday care essentials. And if your dog's ear issues seem connected to food sensitivities, our food safety guides can help you navigate what's safe and what's not.