Dog Ear Infection Symptoms. Understanding and Treating Dog Ear Infections. Dog owners often recognize the early signs of an ear infection…whining, scratching, and head shaking. These infections are common, especially in breeds with floppy ears like Basset Hounds and Cocker Spaniels. Around 20% of dogs experience some form of ear disease, affecting one or both ears. Fortunately, proper care and preventive measures can reduce the severity and frequency of infections.
Types of Ear Infections
There are three types:
- Otitis externa – the most common, affecting the outer ear canal.
- Otitis media & interna – infections of the middle and inner ear, often stemming from untreated outer ear infections. These can lead to deafness, facial paralysis, or balance issues. Early treatment is crucial.
Symptoms to Watch For
While some dogs show only wax buildup or discharge, many experience discomfort, including:
- Head shaking & scratching
- Dark discharge & odor
- Red, swollen ear canal
- Pain & itchiness
- Crusting or scabs in the ears
Causes of Ear Infections
Dogs are prone to infections due to their L-shaped ear canal, which retains moisture. Infections are often caused by bacteria, yeast, or ear mites (in puppies). Contributing factors include:
- Moisture buildup
- Allergies (50% of dogs with skin allergies, 80% with food sensitivities)
- Endocrine or autoimmune disorders
- Wax buildup & foreign objects
- Ear injuries or excessive cleaning
Diagnosing Ear Infections
If your dog shows symptoms, consult a vet promptly. Delaying treatment can allow infections to spread, causing severe complications. Your vet will ask about symptoms, medical history, medications, diet, ear cleaning habits, and recent activities like swimming or grooming.
A physical exam may include:
- Visual inspection for redness, swelling, or discharge
- Otoscope examination of the ear canal and eardrum
- Swab testing for microscopic analysis
- Culture testing in persistent cases
- Biopsies or X-rays for chronic conditions
Are you finding this article useful? Would you like 100% free access to more articles like these, and free access to over 5,000 vetted pet care service professionals throughout the United States? Sign up here for a free Petworks account, and we’ll email you a 10% discount code, good towards your first pet care services booking on Petworks!
Treatment Options
Your vet will clean the ear with a medicated solution and may prescribe prescription ear drops. Severe cases may require oral antibiotics or anti-inflammatory medication.
Most infections clear up within 1 to 2 weeks, but chronic cases may take months. In extreme cases, surgery (Total Ear Canal Ablation) may be necessary to remove diseased tissue and prevent recurrence.
Following your vet’s treatment plan is essential. Finish all prescribed medication, even if symptoms improve, and attend recheck appointments to prevent resistant infections. Proactive ear care can keep your dog comfortable and infection-free. Monitor your dog’s behavior too!
“Ear infections are one of the most common reasons dogs visit the veterinarian, and the frustrating truth is that most recurring cases have an underlying cause — usually allergies — that owners don’t realize needs to be addressed. Treating only the infection without identifying the root cause is like bailing water from a leaking boat. I always tell my clients: if your dog has had more than two ear infections in a year, it’s time to investigate what’s driving them.” – Dr. Karen Becker, DVM, integrative wellness veterinarian and co-author of The Forever Dog
Dog Ear Infections 101
Can a Dog’s Ear Infection Heal on Its Own?
No, most ear infections won’t resolve without treatment. All types of otitis require a veterinarian’s evaluation, as improper care…especially if the eardrum is ruptured…can worsen the condition. Certain cleaners and medications may be harmful to the middle ear.
What Happens if a Dog’s Ear Infection Goes Untreated?
Leaving an ear infection untreated can lead to permanent hearing damage and systemic illness. Severe infections may cause symptoms like loss of appetite or lethargy. Since ear infections are painful, prompt veterinary care is essential.
Can a Dog’s Ear Infection Spread to the Brain?
Though rare, a severe inner ear infection can potentially spread to the brain. Most infections affect only the external ear, but if left untreated, deeper infections can develop and lead to serious complications.
Are Dog Ear Infections Contagious?
Most ear infections are not contagious. However, if caused by ear mites, they can spread rapidly among pets. In such cases, all pets in the household should be treated at the same time.
Frequently Asked Questions: Dog Ear Infection Symptoms
How do I know if my dog’s ear infection is bacterial or yeast? Bacterial infections typically produce a yellow or green discharge with a foul odor, while yeast infections are more likely to cause a dark brown, waxy buildup with a musty or sweet smell. Your veterinarian can confirm the type with a simple swab test, which is important because bacterial and yeast infections require different treatments.
How long does it take for a dog ear infection to clear up? Most mild to moderate ear infections resolve within 1 to 2 weeks with proper treatment. Chronic or severe infections, particularly those involving the middle or inner ear, can take several months to fully clear. Never stop medication early — finishing the full course is critical to preventing antibiotic-resistant infections.
Can I treat my dog’s ear infection at home? While gentle cleaning with a vet-approved ear cleaner can help manage mild symptoms, home treatment is not a substitute for veterinary care. Using the wrong cleaner or medication — especially if the eardrum is ruptured — can cause serious harm. Always consult your vet before treating an ear infection at home.
What breeds are most prone to dog ear infections? Dogs with floppy or heavy ears are most susceptible, including Cocker Spaniels, Basset Hounds, Labrador Retrievers, Golden Retrievers, and Poodles. Dogs that swim frequently or have narrow ear canals, like Shar Peis, are also at higher risk.
How can I prevent ear infections in my dog? Regular ear cleaning with a vet-recommended solution, keeping ears dry after swimming or bathing, managing underlying allergies, and scheduling routine vet checkups are the most effective prevention strategies. Avoid over-cleaning, as this can strip protective oils and irritate the ear canal.
Can allergies cause recurring ear infections in dogs? Yes — allergies are one of the most common underlying causes of chronic ear infections. Approximately 50% of dogs with skin allergies and 80% with food sensitivities develop ear problems. If your dog has frequent ear infections, ask your vet about allergy testing and management.
About PetWorks
In 2021, Dr. Marty Goldstein DVM joined the pet care platform PetWorks as an advisor in its Animal Nutrition care division. Dr Marty Nature’s Blend is on a mission to help your pets live their healthiest lives possible. Dr. Marty’s pet nutrition expertise and guidance has helped PetWorks evolve and become the preeminent animal and pet nutrition consultation service for pet parents in North America.
In 2022, Blue Buffalo Founder Bill Bishop Jr. joined PetWorks as Senior Advisor in our Animal Nutrition Care Division. Bill brings his extensive expertise in pet food innovation and business leadership. His guidance helps PetWorks enhance our pet nutrition service offerings, helping to ensure that pet parents throughout the world receive trusted, science-backed nutritional support for their dogs, cats, and animals.
About The Author
PetWorks Co-Founder Kevin Kinyon is a life-long animal lover who works tirelessly to improve the lives of pets and their parents. Human and animal qualities he values most are integrity, humor, and empathy.
