Persistent head shaking, pawing at ears, redness, unusual discharge, and noticeable odor are the most common early signs of ear infection in dogs. Recognizing these promptly allows dog owners to seek veterinary care before pain, hearing loss, or inner ear complications develop.

At Ridgefield Veterinary Center, we observe that dogs from wooded or humid areas in Connecticut often develop ear infections during spring and summer, highlighting the importance of early detection and monitoring.

What Are the Signs of Ear Infection in Dogs?

Early signs of ear infection in dogs are often behavioral before physical symptoms appear. Dogs may become withdrawn, sleep more, or resist affection. Others may rub their head against furniture or carpet, paw at their ears, or show irritability when the ear is touched. These subtle behaviors are often the first indication of discomfort or inflammation.

The table below breaks down each dog ear infection symptom by category, urgency level, and the recommended next step:

Symptom	Category	What It Indicates	Urgency	Recommended Action
Persistent head shaking	Behavioral	Shaking >1-2 days signals irritation, fluid, or debris in the ear canal	Moderate	Keep your ear dry, monitor 24 hours; book an appointment if it worsens.
Pawing/scratching at ears	Behavioral	Obsessive scratching may indicate localized infection	Moderate	Inspect for redness, debris, or odor (avoid deep probing)
Rubbing face on surfaces	Behavioral	Attempts to relieve itching or pressure	Low–Moderate	Track frequency, reduce irritation triggers
Irritability near the head	Behavioral	Sudden personality shift, flinching	Moderate	Avoid touching the ear; monitor swelling, discharge, odor
Withdrawal from activity	Behavioral	Disengagement from play, food, or social interaction	Moderate	Track appetite and energy; note additional symptoms
Flinching when the ear is touched	Behavioral	Pain or sensitization from inflammation	Moderate	Stop home ear cleaning; prevent further irritation
Redness/swelling in the ear flap	Physical	Immune response or active infection	Moderate	Take photos to track progression; prevent scratching
Abnormal discharge	Physical	Yellow/green = bacterial; brown/black = yeast/mites; bloody = advanced	Urgent	Do not clean deeply; collect photos or notes before contacting the vet.
Unusual odor	Physical	Musty/sweet = yeast; sharp/foul = bacterial	Moderate	Compare both ears; monitor for worsening odor
Crusting/scabbing inside ear	Physical	Dried discharge, chronic irritation, ear mites, or healing injury	Moderate	Prevent picking; monitor for spreading redness/discharge
Warm/thickened ear flap	Physical	Excess warmth/firmness may signal inflammation or an auricular hematoma	Urgent	Use an e-collar if scratching; seek prompt veterinary care

It is worth noting that odor alone can be a reliable early warning sign, even when discharge seems minimal, and the ear looks relatively normal from the outside. If your dog’s ear smells off, do not wait for other symptoms to confirm your instinct.

Mild vs. Severe Ear Infection Symptoms: Know the Difference

Ear infections can escalate quickly if untreated. Use the table below to assess your dog’s condition:

Symptom	Mild / Early Stage	Severe / Advanced Stage	Recommended Action
Head shaking	Occasional	Constant, forceful	Mild: monitor and dry ear; Severe: contact vet immediately
Ear scratching	Light pawing	Breaking skin, causing bleeding	Mild: limit scratching, monitor; Severe: vet visit needed
Discharge	Light waxy buildup	Thick, bloody, or pus-like	Mild: observe and note changes; Severe: collect photo/evidence and call vet
Odor	Faint or slightly musty	Strong, sharp, or foul	Mild: monitor; Severe: seek immediate evaluation
Head tilt	Absent	Persistent, toward one side	Severe: vet visit required to prevent inner ear damage
Balance	Normal	Stumbling, circling, falling	Severe: immediate veterinary attention
Behavior	Slightly withdrawn	Refuses food, cries out in pain	Mild: monitor; Severe: vet intervention needed
Eye changes	None	Unequal pupils, drooping eyelid	Severe: seek immediate veterinary care

If your dog falls into the moderate or severe column, particularly if you are seeing balance issues, eye changes, or signs of intense pain, do not wait for a routine appointment. Contact Ridgefield Veterinary Center right away at 203-438-2658. Our team serves dogs from Ridgefield, Wilton, Danbury, Redding, and surrounding communities, and we are here to help you make the right call.

What Causes Ear Infections in Dogs?

Ear infections in dogs often arise when environmental factors, anatomy, or underlying health conditions create an environment for bacterial or yeast overgrowth. At Ridgefield Veterinary Center, we observe that dogs exposed to humid summers, wooded trails, and swimming in local ponds are particularly prone to ear infections.

According to a large clinical analysis, nearly all cases of canine otitis externa involve bacterial pathogens, with Staphylococcus pseudintermedius among the most common culprits. This is why early recognition of symptoms is critical.

Here are several predisposing factors that make some dogs more susceptible:

Moisture is trapped in the ear canal: Swimming, bathing, and humid weather can all leave water sitting in the L-shaped ear canal, where it does not drain or evaporate easily. This warm, damp environment is ideal for bacterial and yeast growth. Dogs who swim in local ponds or spend time on the wet trails face an elevated risk during the spring and summer months.
Allergies: Environmental allergens and food sensitivities are one of the most common causes of recurring ear infections in dogs. Ongoing inflammation inside the ear weakens the skin barrier and creates the ideal environment for bacteria and yeast to grow. In many cases, repeated ear infections are an early sign of an underlying allergy. If infections keep returning despite treatment, pet allergy testing may help identify the trigger and prevent future flare-ups.
Ear anatomy: Dogs with floppy ears, narrow canals, or heavy ear hair have reduced airflow inside the ear. Heat and moisture stay trapped, creating conditions where infections develop more easily. This is not something an owner can fix, but it does mean some dogs need more consistent ear monitoring than others.
Ear mites: More common in puppies and young dogs, ear mites damage delicate tissue and produce conditions that often lead to secondary bacterial or yeast infections. They are also contagious to other pets in the household, which is an important detail if you have multiple animals.
Foreign objects: Grass seeds, trail debris, and dirt can lodge inside the ear canal during outdoor activity. The resulting irritation quickly escalates into inflammation and infection if the material is not removed.
Hormonal and immune conditions: Hypothyroidism and other hormonal imbalances can weaken skin health and make dogs more prone to recurring ear infections. Dogs with immune-related conditions may also develop infections that are difficult to clear. In these cases, long-term improvement usually depends on treating the underlying condition, not just the infection itself. For dogs diagnosed with hypothyroidism, ongoing thyroid disease treatment and monitoring can play an important role in reducing recurring flare-ups.

Which Dog Breeds Are Most Prone to Ear Infections?

Dogs with floppy ears, narrow ear canals, or heavy ear hair face the highest risk of infection. Labrador Retrievers, Golden Retrievers, and Cocker Spaniels are among the most commonly affected breeds. If your dog is a high-risk breed, regular ear checks are not optional and should be part of responsible ownership.

Breed anatomy also stacks the odds. A Labrador who loves swimming in the reservoir is dealing with both a genetic predisposition to narrow ear canals and a lifestyle that introduces moisture repeatedly. That combination makes consistent ear care especially important.

High-Risk Breeds and Why They Are Vulnerable

Breed	Primary Risk Factor	Practical Owner Tip
Labrador Retriever	Narrow ear canals, frequent swimming	Check ears after every swim; schedule monthly checks during summer
Golden Retriever	Dense ear hair traps moisture	Regular hair trimming and ear drying after water exposure
Cocker Spaniel	Heavy, floppy ears limit airflow	Weekly inspection; vet-approved ear cleaning solutions
Basset Hound	Extra-long ear flaps trap humidity	Use e-collars during active scratching; monitor for odor
Miniature Poodle	Excess hair inside the ear canal	Frequent grooming; observe for early behavioral signs
Beagle	Floppy ears and predisposition to inflammation	Monitor after wet outdoor activity; schedule routine wellness exams

After outdoor activity or swimming, quickly inspect your dog’s ears for redness, odor, or discharge. This simple routine allows you to detect early signs of infection before they require veterinary intervention.

What Is the Difference Between Yeast vs. Bacterial Ear Infection?

Yeast and bacterial ear infections share many symptoms but differ in discharge appearance, odor, and the treatment required. Because the wrong medication will not resolve the infection and can sometimes make things worse, a vet must confirm the type through ear cytology before treatment begins. This is not a situation where guessing produces good outcomes.

Below is a simple comparison of the typical differences between yeast and bacterial ear infections in dogs:

Feature	Yeast Infection	Bacterial Infection
Discharge color	Brown, waxy, dark	Yellow, green, or bloody
Odor	Sweet, musty, yeasty	Sharp, putrid, or foul
Skin appearance inside the ear	Greasy or flaky	Raw, red, and inflamed
Common trigger	Moisture, allergies	Foreign object, trauma, secondary infection
Treatment approach	Antifungal medication	Antibiotic (type varies by organism)
Confirmed by	Ear cytology	Ear cytology

Both types require prescription treatment. There is no reliable over-the-counter option for an active ear infection in dogs. A pet wellness exam with a veterinarian is the best way to determine whether the infection is caused by yeast, bacteria, or both. This allows for an accurate diagnosis and ensures the right medication is prescribed to treat the underlying cause and support proper healing.

How to Tell Whether it is Ear Mites vs. Ear Infection

Ear mites and ear infections can appear similar, with overlapping symptoms such as head shaking, pawing, and discharge. Accurate identification is essential, as treatment differs completely. Ear mites are contagious to other pets, while bacterial or yeast infections typically affect only the individual dog.

In our practice, we often see puppies and young dogs presenting with dark, coffee-ground-like discharge that signals ear mites, while adult dogs more commonly show yellow-green discharge indicating bacterial infections.

Feature	Ear Infection	Ear Mites	Guide
Discharge Color	Yellow, brown, or bloody	Dark brown/black, like coffee grounds	Photograph and note color for vet reference
Most Common In	Dogs of any age	Puppies and young dogs	Age can guide initial suspicion, but vet confirmation is required
Contagious to Other Pets?	No	Yes	Isolate affected animals and check other pets if mites are suspected
Requires Vet Diagnosis?	Yes	Yes	Diagnosis by cytology or microscopic exam ensures correct treatment
Treatment	Antibiotics or antifungals based on cytology	Anti-parasitic medication	Avoid self-treatment; wrong treatment delays recovery

If multiple pets in your home are scratching at their ears at the same time, ear mites become much more likely. A single dog showing symptoms is more consistent with an infection. Either way, a confirmed diagnosis from your veterinarian is the right first step.

What Happens at a Dog Ear Infection Appointment?

Many dog owners are curious about what actually happens during the exam, and for good reason. When you understand the process, it becomes clear why home treatment with over-the-counter products rarely works and why the right diagnosis genuinely changes the outcome.

Here’s what your vet does step by step:

Take a complete history: How long have symptoms been present? Has this happened before? Has the dog been swimming or recently groomed? Previous infections and their treatments are also relevant.
Examine the outer ear and ear flap: The vet assesses redness, swelling, discharge, and any signs of self-trauma from scratching.
Otoscope exam: A specialized instrument with a light and magnifying lens allows the vet to see inside the ear canal and inspect the eardrum. If the eardrum is ruptured, certain medications become unsafe, which is one more reason this step cannot be skipped.
Ear cytology: A swab is collected from the ear canal, stained, and examined under a microscope. This step identifies whether bacteria, yeast, ear mites, or a combination of organisms is present and if bacteria, what type.
Diagnosis confirmed: With cytology results in hand, the vet selects the appropriate medication: antifungal, antibiotic, anti-inflammatory, or a combination.
Treatment prescribed: Most ear infections are treated with medicated ear drops applied at home, sometimes alongside oral medications. Your vet will walk you through the application process during the visit.
Follow-up scheduled: A recheck appointment confirms the infection has fully cleared. Stopping treatment early, even when the ear looks and smells normal, is one of the most common reasons infections return.

At Ridgefield Veterinary Center, our veterinary team provides diagnosis and treatment for dog ear infections. Routine wellness exams can help catch ear issues early and prevent recurring infections.

How to Prevent Ear Infections in Dogs at Home

The most effective prevention is keeping your dog’s ears clean and dry, especially after water exposure or outdoor activity. Regular ear checks, vet-approved cleaning solutions, and early attention to allergy symptoms are the three practices that most reliably reduce recurrence, especially for floppy-eared or water-loving breeds. In some cases, chronic ear infections in dogs can develop when underlying issues are not properly managed over time.

Here’s a safe step-by-step home ear care for your dogs:

Check your dog’s ears once a week. Look for redness, odor, unusual discharge, or changes in the skin inside the ear flap. A healthy ear is light pink, dry, and odorless.
Dry the ears after every water exposure. After swimming, bathing, or a wet outdoor walk, gently wipe the outer part of the ear canal with a soft cloth or cotton ball. Do not probe deeply. Wipe only what you can easily see.
Use only a vet-approved ear cleaning solution. Ask your vet which product is right for your dog’s specific anatomy and history. Avoid hydrogen peroxide, rubbing alcohol, and Q-tips, which can damage delicate tissue or push debris deeper into the dog’s ear canal.
Apply the solution correctly. Fill the ear canal, gently massage the base of the ear from the outside for 20 to 30 seconds, then step back and let your dog shake. Wipe away what surfaces with a clean cloth. Never insert anything past what you can see.
Stop and call your vet if anything seems wrong. If your dog shows pain during cleaning, or if the ear looks inflamed or has unusual discharge, skip the cleaning and call instead. Cleaning an already-infected ear can push debris deeper and make things significantly worse.
Schedule routine wellness exams. Your vet can catch early changes long before they become a full infection. Annual or biannual wellness visits are one of the most practical prevention tools available.

Conclusion

Ear infections in dogs are common, painful, and highly treatable when addressed early and correctly. Recognizing the signs, such as head shaking, scratching, discharge, odor, and behavior changes, helps you act before the condition worsens. The most important takeaway is that early veterinary care is the safest way to treat ear infections and prevent complications such as inner ear infections, which can develop if the problem is left untreated or mismanaged.

At Ridgefield Veterinary Center, we have been caring for dogs from Ridgefield, Redding, Wilton, Danbury, South Salem, and North Salem since 1955. Our Fear Free certified team approaches every ear exam with the same goal, which is to give an accurate diagnosis, the right treatment, and a dog who leaves feeling better than when they came in. Call us at 203-438-2658 or book an appointment online today. We are here to help.

FAQs

What are the common symptoms of a dog’s ear infection?

Common symptoms include excessive head shaking, scratching at the ears, redness inside the ear flap, abnormal discharge, and a noticeable odor. These common symptoms often appear together but may start subtly as mild irritation or behavioral changes. Some dogs also show discomfort, such as head tilting or sensitivity, when the ear is touched.

Why is my dog constantly shaking its head and scratching its ears?

Frequent head shaking and scratching usually indicate irritation inside the ear canal, often causing intense itching from infection, allergies, or trapped moisture. This behavior can worsen inflammation over time, especially if left untreated, and may signal that multiple symptoms are already developing together.

What will a vet do to treat a dog’s ear infection?

A veterinarian will examine the ear, perform diagnostic tests, and then prescribe antibiotics or antifungal treatment depending on the cause. In many cases, topical medication such as ear drops is used, sometimes combined with oral medication, to target infection and inflammation effectively.

Can ear infections in dogs lead to complications?

Yes. If untreated, ear infections can worsen and complications develop, including spread into deeper parts of the ear, chronic pain, or hearing issues. Early treatment helps prevent long-term damage and reduces the likelihood of recurring infections.

Are some dog breeds more prone to ear infections?

Yes. Dogs with floppy ears and limited airflow, such as basset hounds, are more prone to infections. Their ear structure traps moisture and debris, increasing the risk of inflammation and infection over time compared to breeds with upright ears.

How long does recovery usually take after treatment?

Recovery depends on severity. Mild cases improve within days of starting treatment, while more advanced infections may take weeks. Consistent medication use and completing the full course of treatment are essential to ensure full healing and prevent recurrence.

Signs of Ear Infection in Dogs: What Every Owner Needs to Know