Healthy ears: treating and preventing ear infections in dogs

Ear infections are common in dogs and can become painful quickly. Redness, frequent head shaking, scratching, a strong odour, discharge, or tenderness around the ear are all signs that something needs attention. Some dogs also develop a head tilt or seem unsteady when an infection affects deeper parts of the ear.

The best ways to treat and prevent ear infections in dogs depend on the cause. Yeast, bacteria, allergies, ear mites, grass seeds, excess moisture, and the shape of the ear canal can all play a role. A treatment that helps one dog may irritate another or mask a more serious problem.

Australian conditions can add to the risk. Swimming at a Sydney beach, playing in humid Queensland weather, or walking through long grass around Melbourne and regional areas may leave ears damp or expose them to plant material. Regular checks are especially useful after these activities.

Recognising the early warning signs

A healthy ear is usually pale pink, clean, and free from a strong smell. Early infection signs include warmth, swelling, increased wax, brown or yellow discharge, redness, and repeated scratching. A dog may rub its ear on furniture or hold one ear differently from the other.

Pain is an important warning. A dog that pulls away when its ear is touched may need prompt veterinary care, even if the ear looks only mildly irritated. Head tilting, loss of balance, facial drooping, or sudden hearing changes can indicate a deeper infection and should be treated as urgent signs.

Why dogs develop ear infections

The outer ear canal is warm and enclosed, which can allow yeast and bacteria to multiply. Dogs with floppy ears, narrow canals, heavy hair, or allergies are often more vulnerable. Food reactions and environmental allergies can inflame the skin, making recurring otitis externa—the medical term for an outer ear infection—more likely.

Moisture is another common trigger. Dogs that swim regularly or are bathed without having their ears dried may retain water in the canal. Grass seeds, parasites, hormonal disease, and foreign objects can cause similar symptoms. Identifying the underlying cause matters because repeated drops alone will not solve an allergy or a lodged grass awn.

Getting the right veterinary diagnosis

A veterinarian will usually examine the ear with an otoscope and may collect a sample of the discharge for microscopy or cytology. This can show whether yeast, bacteria, inflammatory cells, or parasites are present. The vet may also check the eardrum, which is essential before certain ear medications are used.

For very painful dogs, a deeper examination may require sedation. This is especially relevant when a grass seed or other foreign body is suspected. Australian pet owners should use products registered for veterinary use and follow the prescription or supply directions that apply in their state or territory. The Australian Pesticides and Veterinary Medicines Authority, or APVMA, regulates many veterinary medicines, but a product being available in a pet shop does not make it suitable for every infected ear.

Treating an active infection safely

Treatment may include veterinary ear drops containing an antifungal, antibiotic, anti-inflammatory medicine, or a combination of these. The choice should match the organisms found and the condition of the eardrum. Some dogs need oral medication, pain relief, professional cleaning, or treatment for an underlying allergy as well.

Give the medicine for the full prescribed period, even if the smell and redness improve after a few days. Wash your hands before and after applying drops, keep the bottle tip from touching the ear, and gently massage the base of the ear if your veterinarian demonstrates the correct technique. Never use leftover medication from a previous episode, human ear drops, vinegar, oil, or diluted essential oils.

Cotton buds can push wax deeper, damage delicate tissue, or injure the eardrum. If the canal is blocked with discharge, do not force a home clean. A vet can remove debris safely and recommend an appropriate cleanser, particularly if the ear is sore or the eardrum cannot be seen.

Preventing future ear problems

Check your dog’s ears weekly and after swimming, bathing, bush walks, or visits to the beach. Look for redness, dampness, unusual wax, and odour without repeatedly prodding the canal. Dry only the visible outer ear with a soft towel unless your veterinarian has recommended a specific drying cleanser.

Routine cleaning is helpful for some dogs but unnecessary for others. Over-cleaning can strip protective oils and irritate the skin, while infrequent cleaning may allow wax to build up. Ask your vet how often to clean and which product suits your dog. Dogs with recurring infections may benefit from an individual ear-care schedule rather than a generic product from a supermarket or online marketplace.

Keeping hair neatly trimmed around the ear opening can improve airflow, but plucking hair from the canal may cause inflammation. Weight management, parasite control, and sensible grooming also support skin health. During hot, humid periods in Brisbane or Far North Queensland, pay particular attention to moisture after water play.

Managing recurring infections

An infection that returns several times a year is usually a symptom of another problem. Allergies, chronic skin disease, ear-canal narrowing, mites, endocrine disorders, or an untreated foreign body may be involved. Your vet may recommend allergy management, dietary trials, blood tests, or referral to a veterinary dermatologist.

Keep a simple record of flare-ups, swimming, food changes, medications, and environmental exposure. This can reveal patterns, such as symptoms appearing after spring grass exposure or repeated beach visits. Do not stop a long-term allergy plan when the ears look better unless your veterinarian advises it, because inflammation can return before obvious discharge appears.

Prompt treatment reduces discomfort and lowers the risk of a chronic, thickened ear canal. Arrange a veterinary appointment when your dog shows pain, discharge, odour, persistent scratching, or head shaking; seek same-day care for balance problems, a severe head tilt, marked swelling, or sudden hearing loss.

Begin by examining your dog’s ears in good light today, and book a vet visit before using any ear cleaner or medicine if you notice redness, pain, discharge, or a strong smell.