Funky Fur and Fungal Foes: Battling Systemic Yeast in Dogs

 

As groomers, we see dogs with symptoms of yeast infections almost every day. From itchy, irritated skin and oily coats to foul-smelling ears and constant scratching, many of the signs are familiar. What many pet owners may not realize is that these symptoms can sometimes point to a deeper issue—systemic yeast infections. While localized yeast infections are fairly common in dogs, systemic yeast infections are less well-known but can be much more serious. These infections occur when yeast, typically Candida or Malassezia, grows out of control and spreads throughout the body, affecting not just the skin but internal organs as well. In this article, we’ll explore the causes, symptoms, diagnosis, and treatment of systemic yeast infections in dogs.

What is a Systemic Yeast Infection?

A systemic yeast infection is when yeast overgrowth extends beyond the skin and ears, spreading through the body. Normally, yeast exists in small amounts on the skin, in the gastrointestinal tract, and in other mucous membranes without causing harm. However, when there’s an imbalance—often due to an underlying health issue—the yeast can multiply and invade other parts of the body, including the bloodstream, digestive system, urinary tract, and even the respiratory system.

This overgrowth can lead to a variety of symptoms that affect the dog's overall health and quality of life. While systemic yeast infections are not always easy to diagnose, they are treatable with the right approach.

Causes of Systemic Yeast Infections

Systemic yeast infections usually occur when the balance of microorganisms in the dog’s body is disrupted. Some of the most common causes include:

Weakened Immune System: Dogs with compromised immune systems, such as those with cancer, diabetes, or autoimmune diseases, are more susceptible to yeast overgrowth. Medications like steroids or chemotherapy can also weaken the immune system.  One of the greatest issues is that vets often treat systemic yeast WITH steroids!

Chronic Use of Antibiotics: Antibiotics can disrupt the natural balance of bacteria in the gut, leaving yeast unchecked. When beneficial bacteria are reduced, yeast has an opportunity to thrive.

Endocrine Disorders: Conditions such as Cushing’s disease, hypothyroidism, or diabetes can contribute to systemic yeast infections. These diseases affect hormone production and immune function, creating a more favorable environment for yeast growth.

Diet and Gut Health: A diet high in carbohydrates and sugars can fuel yeast overgrowth, as yeast feeds on sugars. Dogs with food allergies or sensitivities are also more likely to develop yeast infections.

Chronic Skin Conditions: Dogs with skin allergies, hot spots, or other inflammatory skin diseases may be more prone to yeast infections due to compromised skin barriers.

Symptoms of Systemic Yeast Infections

The symptoms of systemic yeast infections vary depending on which part of the body is affected. Some common signs include:

Skin and Coat

Itchy, red, or inflamed skin

Hair loss (especially around the face, paws, and underarms). It's worth citing that loss of hair around the eyes may be a sign of thyroid problems. I'll cover that in another article.

Greasy or oily coat with a strong musty odor

Thickened skin (in severe cases)

Frequent licking or chewing at affected areas

Ears

Red, inflamed ears

Excessive ear wax or discharge

Head shaking or scratching at the ears

Foul-smelling odor from the ears

If left untreated, systemic yeast infections can lead to more serious complications, including septicemia (infection in the bloodstream) and multi-organ failure, making early diagnosis and treatment essential.

Diagnosing Systemic Yeast Infections

Diagnosing systemic yeast infections can be challenging because the symptoms often mimic other conditions, such as bacterial infections or allergies. Your veterinarian will typically start by performing tests that may include:

Blood tests to check for signs of infection, metabolic imbalances, or organ dysfunction.

Urine tests to identify yeast in the urinary tract.

Fecal tests to look for yeast overgrowth in the gastrointestinal system.

Ear or skin scrapings to identify yeast under a microscope.

While we can't perform the blood or skin allergy test, we do offer Nutriscan, the 

Treatment of Systemic Yeast Infections

Treatment for systemic yeast infections typically involves a combination of antifungal medications, management of underlying conditions, and supplements.

Diet changes: A balanced, low-glycemic, or hypoallergenic diet may be recommended to prevent yeast overgrowth and support overall health.  Raw feeding is ideal, brands such as Primal, Vital Essentials and OC Raw are some of the best in the market.  The only kibble I personally vouch for is CARNA4.  Stay away from brands like Science Diet or Royal Canin.  Stop feeding anything white (with flower), that includes bread, pizza and any dog biscuits that may contain flour.

Skin and Ear Care

Regular baths with antifungal shampoos can help control skin infections and reduce symptoms.

Keeping the ears dry and clean is essential for preventing ear infections in dogs prone to yeast.  That's why we put cotton in the ears of ALL dogs during bathing.

Probiotics

After antibiotic treatment, probiotics may be beneficial to restore the balance of healthy bacteria in the gut and prevent the overgrowth of yeast.  This is one of the most important steps in healing the gut. Human probiotics are perfectly fine. Read my article on Probiotics to learn more about strains and quantities of probiotics to give.

Supportive Care

In more severe cases, dogs may require fluid therapy and nutritional support to help them recover.

CBD (cannabidiol) can and should be used as an anti-inflammatory.

Preventing Systemic Yeast Infections

While it may not always be possible to completely prevent systemic yeast infections, certain steps can help reduce the risk:

Maintain a balanced diet: Feed your dog a high-quality, well-balanced diet and avoid excess sugar or carbohydrates.

Regular grooming: Regular baths and ear cleanings can help manage the buildup of yeast on the skin and in the ears.

Monitor your dog’s health: Keep an eye on any changes in your dog’s skin, coat, appetite, or behavior, and seek veterinary care if you notice signs of infection.

Systemic yeast infections in dogs can be challenging to manage, but with prompt diagnosis and appropriate treatment, most dogs recover fully. As groomers, we often see the early signs of yeast infections, and we encourage pet owners to seek veterinary advice if their dog is experiencing persistent symptoms. By addressing both the infection and any underlying health issues, you can help your dog return to a healthy, happy life.

Giulio Ferrari
Certified Pet Nutritionist
Lucky Dog Grooming
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Links:
www.LuckyDogGroomingTX.com www.Carna4.com www.VitalEssentials.com

www.ocraw.com