Dog Ear Yeast Infection: Causes & Solutions

Dog Ear Yeast Infection

If your dog’s shaking his head or scratching his ears constantly, it could be a dog ear yeast infection. One or both of his ears might have a yeasty smell, or black-brown gunk caking the insides. When your dog’s ears are crusty, smelly and inflamed, it’s a warningsign of a bigger health issue … 

Read on to learn how to look beyond your dog’s earsto find the problem … and the solution. 

What Are Ear Yeast Infections In Dogs?

This type of yeast infection affects the visible part of your dog’s ear. Inflammation in the outer flap of your dog’s ear is called otitis externa

A dog ear yeast infection may be mistaken for allergies. But it’s often caused by yeast.  It could be candida, the most common type of yeast … but it might also be malassezia, a different type of yeast. Yeast can smell musty … a bit like an old shoe. Your dog’s itching will be intense, and there may be a brown or black discharge. (Wipe the inside of the ear with a cotton ball or pad to see if it comes out brown and greasy.)

Before we dive into symptoms and natural remedies for dog ear yeast infections, we need to rule out two other possible culprits for your dog’s ear issues: bacterial ear infections and ear mites. These both share some common symptoms with dog ear yeast infections. 

Dog Ear Infection Yeast vs Bacterial

Here’s how to tell the difference between bacterial and yeast ear infections in dogs:

  • Yeast Infection: Yeast thrives in warm, moist environments and can multiply rapidly in your dog’s ear canal, leading to inflammation and itching. The giveaway here is the distinct “yeasty odor” accompanied by dark brown or black discharge.
  • Bacterial Infection: A bacterial infection in your dog’s ear is usually the result of an underlying issues like allergies or an injury that creates an ideal environment for bacteria to flourish. In this case, the discharge from a bacterial infection is typically yellow or green.

Dog Ear Yeast Infection vs Ear Mites

Here’s how to tell the difference between dog ear yeast infections and ear mites. 

  • Yeast Infection: A dog ear yeast infection often includes symptoms like itching, redness, a yeasty odor, and dark brown or black discharge. Yeast infections are not contagious to other animals or humans.
  • Ear Mites: Ear mites are tiny parasites that infest a dog’s ear canal. Ear mites are highly contagious and can spread to other pets in the household. Common signs of ear mites include excessive scratching, head shaking, dark, crumbly discharge resembling coffee grounds, and visible mites in the ear canal.

Dog Ear Yeast Infection Symptoms

Here are some common signs of dog ear yeast …

  • Swelling, sometimes with redness, inside the ears
  • Large amounts of dark brown waxy discharge
  • Very itchy, with constant scratching   
  • Drooping ears
  • Strong smell from the ears
  • Sometimes painful and inflamed
  • Head shaking or tilting
  • Scabs and thinning fur around ears (from scratching)

You might also see signs of malassezia or other yeasts on other moist parts of the body, like the groin or armpits …

  • Small red bumps
  • Flaky grey crustiness
  • Orange-peel or darkened, thickened skin
  • Redness between the toes
  • Brown crud on top of the toenail

Causes Of Dog Ear Infections

What causes dog ear infections?

A yeast infection in a dog’s ear isn’t just superficial. Your dog’s yeasty ears stem from yeast overgrowth in your dog’s body. Yeast is present in healthy ears, but there are a few factors that can cause it to grow out of control.


Any processed kibble diet worsens yeast because carbohydrates create sugars that feed yeast. And that’s especially true of candida yeast. 

Oily Or Moist Skin

Malassezia yeast is a bit different. It’s lipophilic, meaning it likes fats (lipids). That means dogs with oily skins or coats are more prone to malassezia. Dogs who love to swim can also be more susceptible because they’re often damp in places like their ears, groins and armpits. 


Antibiotics and anti-allergy drugs are another big concern. Antibiotics destroy both bad and good bacteria, which allows yeast to grow out of control. And if your dog gets allergy medications like Apoquel when his ear infections are mistaken for allergies, these immune-suppressing drugs make him more susceptible to yeast overgrowth. 

Heavy Metals

Heavy metals and environmental toxins can also harm the beneficial bacteria in your dog’s gut, allowing yeast to grow. Heavy metals and other toxins get into your dog’s body through vaccines, flea and tick preventatives, cleaning products, food and water.  

Your dog’s ear yeast infection is usually a sign of a deeper problem in his body …  

What Foods Cause Ear Yeast Infection In Dogs?

Food can be a major factor in triggering your dog’s yeast ear infection. Food containing carbohydrates like grains, legumes and starches can trigger food sensitivities that upset your dog’s microbiome. When the gut flora is unbalanced, your dog’s good bacteria is overrun by pathogenic bacteria that encourage the yeast to grow. 

High carbohydrate diets like kibble feed yeast when they’re digested and broken down into sugar molecules. That leads to yeast growing larger colonies in the gut … and causes chronic inflammation that can trigger ear yeast infections.

Artificial ingredients like preservatives, flavorings and synthetic vitamins and minerals can also contribute to yeasty ears.

Soothing Home Remedy For Yeast Infection In Dog’s Ear

The most aggravating part of a dog ear yeast infection, for both you and your dog, is the itching. Here are some things to bring relief.

  1. Calendula lotion. Calendula can relieve pain and reduce inflammation. Its antimicrobial properties help prevent infection. Get herbal calendula in tincture form. Add 5 to 10 drops of calendula tincture to 1 cup of lukewarm filtered water. Use a dropper or sponge it into the ears.
  2. Apple cider vinegar. Dilute apple cider vinegar 50/50 with water, then use it on a cotton ball to gently wipe your dog’s ears to relieve itching. 
  3. Mullein oil. Herbalist and holistic veterinarian Randy Kidd DVM PhD recommends a mullein mix for ear infections. You can make your own or buy mullein oil at health stores. Apply a few drops of warmed oil into the ear canal daily.

Can You Put Peroxide In A Dog’s Ear?

No. It’s never a good idea to use alcohol or hydrogen peroxide dog ear yeast infections. They’ll dry out and irritate his ears. They could irritate open wounds, cause inflammation in the ear canal and worsen infections. And they destroy good bacteria that’s needed for healing. 

How To Treat Dog Ear Yeast Infection Without Vet

How do you get rid of a yeast infection in a dog’s ear? Here are several things you can do to begin to get your dog’s yeasty ears under control.

Remove Processed Foods

You should start by removing processed food from your dog’s diet … carbs and sugar are what yeast thrives on. Feeding a high carbohydrate kibble diet often leads to food allergies or intolerances that make your dog more susceptible to yeast. This can also help with preventing yeast ear infections in dogs’ ears in the first place.

Feed A Whole Food Diet

A whole food, raw meat-based diet is the best medicine for a dog with yeast issues. Just stay away from carbs and starchy vegetables that feed yeast.

Add Foods And Supplements That Fight Yeast

Include these foods and herbs or supplements in your dog’s diet to fight yeast:

  • Garlic: research shows it can break down yeast colonies. 
  • MCT oil: it contains caprylic acid that kills yeast. 
  • Pau d’arco: contains lapachol, which can destroy yeast. 
  • Probiotics: probiotic for dog ear yeast infection can rebuild the healthy bacteria in your dog’s gut.
  • Saccharomyces boulardii:  a type of yeast that helps stop other yeasts from spreading in your dog. 
  • Omega-3 fatty acids: to lower overall inflammation.
  • Digestive enzymes: break down biofilms and fiber that form a protective shell around the yeast. 
  • Olive leaf: an antifungal herb that kills yeast.

Remove Toxins

Steer clear of drugs. pesticides, herbicides and poor quality food and water. Heavy metals and other toxins build up in your dog, disrupting his gut health and allowing yeast to flourish. 

Heal Your Dog’s Gut 

The gut needs a lot of attention because imbalances can cause food intolerances. And those same imbalances can lead to dog ear yeast infections. 

When your dog has an ear yeast infection, it means his immune system needs help. About 90% of your dog’s immune system lives in his gut … so a healthy gut leads to overall health.

You also want to be sure it’s not leaky gut causing the yeast problem. Many chronic health issues stem from leaky gut. Everything that causes dog ear yeast infection can also cause leaky gut.  … like poor diet, drugs, toxins, and over-vaccination. Do you see a familiar pattern emerging? So if you address leaky gut, you’ll also tackle the yeast.

Toxins and bad bacteria overwhelm the body and harm the cells that line your dog’s gut. Food particles, bacteria and toxins get into the bloodstream … leading to many chronic health problems.

Leaky gut takes time to heal … but once you begin addressing it and making changes, it makes a huge difference in your dog’s health.  

When you look beyond the ears, you can bring relief to your dog’s itchy yeasty ears. It takes time but the result is long-term health for your dog … as well as yeast-free ears!


How do you get rid of a yeast infection in a dog’s ear?

To tackle a yeast infection in your dog’s ear, switch to a whole-food, raw meat-based diet while using soothing remedies like diluted apple cider vinegar or mullein oil for immediate relief.

What foods cause yeast infections in dogs’ ears?

Foods high in carbohydrates, grains, legumes, and starches can trigger yeast infections in dogs by upsetting their gut microbiome and providing sugars that fuel yeast overgrowth.

What kills yeast on dogs naturally?

Natural remedies such as garlic, MCT oil, and herbs like pau d’arco and olive leaf can help kill yeast, while probiotics and omega-3 fatty acids support gut health to prevent its return.

What not to feed a dog with a yeast infection?

Avoid processed foods and carbohydrate-rich items like grains and starchy vegetables that promote yeast overgrowth and inflammation in dogs.

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