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What Does Ringworm Look Like on a Dog?

What Does Ringworm Look Like on a Dog?

A mysterious, ring-like rash on your dog's skin can be alarming. The sudden appearance of these red, scaly patches may leave you wondering, what exactly your dog has gotten into and "how can I help my dog?" In this comprehensive guide, we'll walk you through the symptoms of ringworm, its diagnosis, treatment, and the role of nutrition in boosting your dog's overall well-being.

Ringworm in Dogs: Identification and Symptoms

Dog Ringworm


Ringworm, contrary to its name, isn't caused by a worm. It's a skin infection triggered by a group of fungi known as dermatophytes. The name "ringworm" comes from the characteristic ring-shaped rash that can appear on the skin.

When ringworm infects dogs, the most common signs include:

  • Circular areas of hair loss (alopecia)
  • Red, scaly, and itchy skin
  • Darkened or reddened skin (hyperpigmentation)
  • Dandruff-like scaling
  • Crusty, inflamed patches

These symptoms can appear anywhere on your dog's body. However, they are most commonly seen on the face, ear edges, paws, and the tail.

Diagnosing Ringworm in Dogs: Tools to Use For Correct Diagnosis

ringworm in dogs

If you notice any signs of ringworm on your dog, it's essential to contact your vet immediately to get an accurate diagnosis. Though these symptoms can suggest ringworm, they might also indicate other skin conditions, such as mange or allergic dermatitis.

To diagnose ringworm in dogs, your vet will need to perform a series of tests. These may include:

  • Wood's Lamp Examination: This is a special ultraviolet light used to inspect the fur and skin. However, not all ringworm species will fluoresce under this lamp.

  • Microscopic Exam: Hair or skin cells are examined under a microscope to identify fungal spores.

  • Fungal Culture: This is the most accurate method. It involves growing the fungus in a laboratory setting from skin or hair samples.


How Dogs Contract Ringworm

Ringworm is a highly contagious infection, not just among dogs, but across multiple species, including humans. The fungi responsible for ringworm live and multiply on the skin and hair follicles, causing the characteristic symptoms. But how does a dog contract ringworm? Here are the primary ways:

  • Direct Contact: The most common way dogs contract ringworm is through direct contact with an infected animal. This contact doesn't have to be prolonged; even brief interactions at a dog park, daycare, or on a walk can potentially transmit the infection.

  • Indirect Contact: Ringworm spores are hardy and can survive in the environment for a long time. Dogs can contract the infection by coming into contact with objects or environments contaminated by an infected animal. This includes bedding, grooming tools, collars, toys, or even soil where an infected animal has been.

  • Humans to Dogs: Surprisingly, humans can also pass ringworm to dogs. If a person has a ringworm infection and interacts with their dog, the fungus can transfer and start an infection.

  • From the Mother to the Pups: In some cases, a mother dog infected with ringworm can pass the infection to her puppies. This is why it's essential to get new puppies checked and ensure they're ringworm-free.

  • Weakened Immune System: Dogs with weakened immune systems, puppies, elderly dogs, or dogs with pre-existing conditions are more susceptible to ringworm infection. While they still need exposure to the fungi to contract the disease, they're more likely to become infected after exposure compared to a healthy adult dog.

Remember, ringworm doesn't always appear immediately after exposure. The incubation period can be anywhere from a few days to a couple of weeks. If your dog has been in a situation where they could have been exposed to ringworm, keep a close eye on their skin and hair for any changes.


Treating Ringworm in Dogs

The treatment for ringworm in dogs often involves a multi-faceted approach. It typically includes topical therapy (medicated shampoos, creams), systemic medication (antifungal drugs), and environmental cleaning to prevent reinfection.

  • Topical Therapy: Medicated shampoos and creams can help to kill the fungus on the skin and hair. Topical medications often contain ingredients like miconazole or chlorhexidine.

  • Systemic Medication: Antifungal drugs such as itraconazole or fluconazole may be given orally to combat the infection from within.

  • Environmental Cleaning: As ringworm spores can survive in the environment for a long time, thorough cleaning and disinfecting of your home is necessary.

The treatment for ringworm in dogs requires a multi-faceted approach. It involves utilizing topical therapy, systemic medication, and a proper environment to prevent reinfection, as ringworm spores can persist in the environment for extended periods. By implementing this comprehensive approach, dog owners can effectively treat ringworm and promote a healthy, fungus-free environment for their companions.


How to Prevent the Spread of Ringworm if You've Found an Infection

Preventing the spread of ringworm is vital to safeguard the health of your dog and other pets in your household. Here are essential measures you can take to minimize the risk of ringworm transmission:

  • Isolate Infected Pets: If one of your pets has been diagnosed with ringworm, separate them from other animals in the house. This helps prevent the spread of spores and reduces the chances of healthy pets contracting the infection.
  • Strict Hygiene Practices: Maintain good personal hygiene by washing your hands thoroughly with soap and water after handling an infected pet. Additionally, wear gloves when applying topical medications or treating a pet with ringworm.
  • Regular Cleaning: Regularly clean and disinfect the living areas and bedding of both infected and healthy pets. Vacuum carpets and furniture to remove any loose hair or skin cells that may harbor ringworm spores. Use a disinfectant that is effective against fungi.
  • Launder Pet Items: Wash any bedding, blankets, toys, or clothing items that have come into contact with an infected pet. Use hot water and a fungicidal detergent to ensure proper sterilization.
  • Environmental Decontamination: Consider using a diluted bleach solution (1:10 ratio) to disinfect surfaces that cannot be laundered or easily cleaned. Pay special attention to areas your pet frequently visits or rests, such as their bedding, scratching posts, and favorite spots.
  • Avoid Common Areas: Prevent your infected pet from accessing shared spaces, especially areas frequented by other pets or where they might come into contact with objects or surfaces that could spread the infection.
  • Check and Treat Other Pets: Regularly examine all household pets for any signs of ringworm. If you notice any suspicious lesions or hair loss, consult a veterinarian promptly for examination and treatment.
  • Vet Visits: Schedule routine veterinary check-ups for your pets to ensure early detection of any potential ringworm cases. Timely identification and treatment can prevent the further spread of the infection.


Role of Nutrition in Dog's Health

Nutrition plays an integral part in maintaining a dog's overall health, including the health of their skin and coat. Just as a balanced, nutritious diet supports human health, the same principle applies to our canine companions.

A whole prey diet can be particularly beneficial. It emulates the diet dogs would naturally consume in the wild, consisting of a variety of meat sources, including muscle meat, bone, organ meats like liver, heart, and kidney, and even blood. Such a diet is rich in essential nutrients like proteins, fats, vitamins, and minerals, that are vital for your dog's health.

Whole Beast dog treats are formulated specifically to provide your pet the proper nutrition found only from a whole prey diet. Made from American-raised, grass-fed beef, the Whole Beast includes beef, liver, kidney, heart, blood, and bone broth. This unique blend provides a nutritionally-rich treat that not only tastes good but supports your dog's overall wellbeing.

The high-quality protein in our Whole Beast treats aids in maintaining healthy skin and hair. Essential fatty acids contribute to a shiny, healthy coat, while vitamins and minerals boost your dog's immune system, helping them to fight off infections like ringworm.


Ringworm in dogs can be a daunting issue to tackle. However, with a keen eye for symptoms, timely veterinary intervention, and a robust health-boosting diet, your dog can recover from this fungal infection and continue to live a happy, healthy life. Remember, the best defense against ailments like ringworm is a good offense, and whole prey nutrition is a key part of that strategy.

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