Ear Infections in Dogs & Cats: Causes & Treatment
If your pet is shaking their head, scratching their ears, or you notice a foul smell coming from their ears, an ear infection may be the problem. Ear infections are extremely common in dogs and can be painful if left untreated. At Eastex Veterinary Clinic in Humble, TX, we quickly identify the cause of ear infections and provide relief.
Early treatment prevents complications and helps your pet feel better fast. Don’t wait—if you suspect an ear infection, call (281) 446-7148 for an appointment.
What Causes Ear Infections?
Ear infections result from bacteria, yeast, or parasites growing in the ear canal. Several factors can predispose your pet to infections:
Anatomy
Dogs, especially those with floppy ears (Cocker Spaniels, Basset Hounds), have L-shaped ear canals that trap moisture and debris, creating ideal breeding grounds for infection.
Allergies
Food and environmental allergies cause inflammation in the ear canal, making it susceptible to secondary infection. In fact, chronic ear infections are often a sign of underlying allergies.
Moisture
Swimming, bathing, or living in humid climates can trap moisture in ears, promoting infection. Pets who frequently get their ears wet need regular ear cleaning.
Ear Mites
These parasites cause extreme irritation and can lead to infections. Ear mites are contagious and more common in outdoor pets.
Debris and Wax Buildup
Dirt, wax, and hair accumulation creates an environment where bacteria and yeast thrive.
Foreign Objects
Grass awns or other foreign materials lodged in the ear canal cause irritation and infection.
Signs of Ear Infection
Watch for these signs that your pet may have an ear infection:
- Head shaking or tilting
- Scratching or pawing at the affected ear
- Redness or swelling inside the ear
- Discharge (waxy, crusty, or foul-smelling)
- Foul or yeasty odor from the ear
- Sensitivity to touch on or around the ear
- Behavioral changes or irritability
- Balance problems or disorientation (in severe cases)
Some pets with ear infections also have systemic signs like fever or lethargy. Any of these signs warrant a veterinary visit.
How We Diagnose Ear Infections
We use an otoscope to visualize the ear canal and identify inflammation, discharge, or foreign objects. We may collect a sample of ear discharge for microscopic examination to identify the causative organism (bacteria, yeast, or parasites).
This helps us select the most effective treatment. We also discuss potential underlying causes like allergies to prevent recurrence.
Treatment of Ear Infections
Treatment depends on the cause and severity of infection.
Ear Cleaning
Professional ear cleaning removes debris and discharge, allowing medications to reach affected tissues. We use gentle, effective solutions to clean ears thoroughly.
Topical Medications
Medicated ear drops or ointments treat the infection directly. These may contain antibiotics for bacterial infections, antifungals for yeast, or antiparasitics for mites. Most pets improve within 7-14 days of treatment.
Oral Medications
Systemic antibiotics or antifungals may be needed for severe or recurring infections.
Addressing Underlying Causes
If allergies are causing infections, we discuss allergy diagnosis and management. Treating underlying skin conditions prevents future infections.
Prevention of Ear Infections
Help prevent ear infections by:
- Regular ear checks and cleaning (especially for floppy-eared breeds)
- Drying ears thoroughly after bathing or swimming
- Managing allergies with proper diet and treatment
- Keeping the ear canal dry and clean
- Treating mites and parasites promptly
- Regular veterinary check-ups to catch early signs
Chronic Ear Infections
Some pets suffer from recurrent ear infections. This usually indicates an underlying allergy or chronic condition. We work to identify and address root causes to break the infection cycle. In some cases, we may refer you to a specialist dermatologist for comprehensive allergy evaluation.
Questions About Ear Infections?
Can I treat my pet’s ear infection at home?
We don’t recommend home treatment without veterinary diagnosis. Using the wrong treatment can worsen infection or damage the ear. Always have us examine and diagnose the problem first.
Are ear infections contagious between pets?
Ear mites are contagious. If one pet has mites, others in the home need treatment. Bacterial and yeast infections are typically not contagious between pets.
How long does an ear infection take to heal?
Most uncomplicated ear infections improve within 7-14 days of proper treatment. Chronic infections may take longer and require ongoing management.
Can ear infections cause hearing loss?
Severe or chronic infections can damage the ear canal and potentially affect hearing. This is another reason to treat infections promptly.
Why does my dog keep getting ear infections?
Recurrent infections usually indicate an underlying allergy or chronic condition. We’ll work to identify and address the root cause.
What’s the difference between bacterial and yeast ear infections?
Bacterial infections may have purulent (pus-like) discharge; yeast infections often have a yeasty odor and waxy discharge. Microscopic examination confirms the organism, and treatment differs accordingly.
Do I need to finish all the ear medication even if the infection looks better?
Yes, always complete the full course of medication as prescribed. Stopping early can allow the infection to recur.