Last updated: June 11, 2026 · 7-minute read
How Do You Treat Ringworm on Dogs? The Short Answer
Ringworm in dogs is a fungal infection (not a worm) treated with a combination of vet-prescribed antifungal medication, topical creams or medicated shampoos, and rigorous home decontamination. Most cases clear in two to four weeks with consistent treatment. Throughout recovery, low-stress, single-ingredient, fully digestible chews with no rawhide help keep an isolated, itchy dog calm and cooperative during daily medication. Bully Sticks Central chews are ethically sourced from grass-fed American and Argentinean farms.
Key takeaways
- Ringworm is a contagious fungal infection, not a parasite — it spreads to other pets and people, so isolation and hygiene matter as much as medication.
- Always confirm with a vet; treatment usually combines oral antifungals, topical creams, and medicated baths.
- Expect a two-to-four-week course, sometimes longer; finish the full treatment even after lesions look healed.
- Decontaminate bedding, floors, and grooming tools repeatedly — fungal spores survive in the environment for months.
- Long-lasting, single-ingredient chews keep a confined dog occupied and make medication time stress-free for both of you.
What Is Ringworm and How Do Dogs Get It?
Ringworm (dermatophytosis) is caused by fungi that feed on keratin in skin, hair, and nails. Despite the name, no worm is involved — the "ring" refers to the classic circular lesion. Dogs catch it through direct contact with an infected animal or person, or from contaminated objects like bedding, brushes, carpet, and soil. Puppies, senior dogs, and dogs with weakened immune systems are most susceptible.
What Does Ringworm Look Like on a Dog?
The most common signs are circular patches of hair loss, often with red, scaly, or crusty skin at the edges. You may also see brittle or broken hairs, dandruff-like flaking, darkened skin, or inflamed nail beds. Lesions frequently appear on the head, ears, paws, and forelegs. Itching varies — some dogs scratch constantly, others barely notice. Because these signs overlap with allergies and mange, a vet diagnosis is essential.
How Do You Treat Ringworm on Dogs Step by Step?
Effective treatment attacks the fungus on three fronts: the dog, the environment, and prevention of reinfection. Follow this routine consistently for the full course your vet prescribes.
- Confirm the diagnosis. See your vet for a fungal culture, UV (Wood's lamp) exam, or PCR test. Guessing wastes time and risks spreading the infection.
- Give oral antifungals as directed. Medications such as itraconazole or terbinafine are commonly prescribed. Give every dose on schedule and complete the full course, even after the coat looks normal.
- Apply topical treatment. Use prescribed antifungal cream on individual lesions and bathe your dog in a medicated (lime sulfur or miconazole/chlorhexidine) shampoo as recommended, usually twice weekly.
- Isolate and decontaminate. Confine your dog to one easy-to-clean room. Wash bedding in hot water, vacuum daily, and disinfect hard surfaces. Discard or sanitize brushes and toys.
- Recheck with your vet. Ringworm is only "cured" after follow-up cultures come back negative — often two clear tests a week or two apart. Keep treating until then.
How Long Does Ringworm Take to Clear in Dogs?
With consistent treatment, most dogs improve within one to three weeks and fully resolve in two to four weeks. Severe or long-haired cases can take six weeks or more. The biggest reasons treatment fails are stopping medication early and skipping environmental cleaning, which lets spores reinfect your dog.
How Do Treats Help During Ringworm Recovery?
Recovery means daily handling, baths, and weeks of confinement — all stressful for a dog. A long-lasting chew turns medication and bath time into a positive experience and keeps an isolated dog mentally occupied so they're less likely to scratch or chew at healing skin. Because a sick or stressed dog's gut is already sensitive, you want chews that are single-ingredient, 100% real meat, and fully digestible — with no rawhide, chemicals, or mystery additives.
Which chews work best for a recovering dog?
| Chew | Best for | Chew time |
|---|---|---|
| 6-Inch Standard Bully Sticks | Everyday distraction during medication | Moderate |
| 12-Inch Monster Bully Sticks | Long confinement days, large breeds | Long |
| Beef Cheek Rolls | Gentle, satisfying chewing | Moderate |
| Cow Ears for Dogs | Lighter, quicker reward after a bath | Short |
| Beef Trachea Tubes | Senior dogs and gentler chewers | Short–moderate |
| Regular Beef Tendons | Smaller dogs and puppies | Short |
| 10-Inch Tripe Twist Sticks | Picky eaters who need extra enticement | Moderate |
Browse the full range in our natural dog treats and chews collection or shop our bully sticks collection.
How Do You Stop Ringworm From Spreading to People and Other Pets?
Ringworm is zoonotic, meaning it spreads between animals and humans. Wear gloves when handling your dog or applying treatment, wash your hands thoroughly, and keep the infected dog separated from other pets and from young children, seniors, or anyone immunocompromised. Launder your own clothing after contact, and keep up environmental cleaning for the entire treatment period plus a week or two afterward.
Related reading
- High-Calorie Treats for Dogs — helpful for keeping weight on a dog who's off their food during recovery.
- Can Puppies Have Bully Sticks? — puppies are especially prone to ringworm, so know which chews are safe for them.
Frequently Asked Questions
Can ringworm in dogs go away on its own?
In healthy dogs it sometimes resolves over several months without treatment, but it remains contagious the entire time and can spread to other pets and people. Treating it is faster and far safer for your household.
Is dog ringworm contagious to humans?
Yes. Ringworm passes easily between dogs and people through direct contact or contaminated surfaces. Wear gloves, wash your hands, and keep vulnerable family members away from the infected dog.
What kills ringworm spores in the home?
Diluted bleach (about 1:10) on hard surfaces, hot-water laundering of bedding, and frequent vacuuming all reduce spores. Spores can survive in the environment for up to 18 months, so clean repeatedly throughout treatment.
Can I still give my dog chews while they have ringworm?
Yes. Safe, single-ingredient, fully digestible chews with no rawhide are a great way to keep a confined dog calm and reward cooperation during medication. Always supervise chewing and pick a size suited to your dog.
How is ringworm diagnosed in dogs?
Vets use a fungal culture (the gold standard), a Wood's lamp UV exam, microscopic hair analysis, or PCR testing. Culture is most reliable because some ringworm species don't glow under UV light.
Will my dog's hair grow back after ringworm?
Almost always. Once the infection clears and the skin heals, hair typically regrows over a few weeks to a couple of months. Persistent bald patches warrant a follow-up vet visit.
Can ringworm come back after treatment?
Yes, usually from lingering environmental spores or stopping treatment too early. Finishing the full course, decontaminating thoroughly, and confirming negative follow-up cultures greatly reduces the chance of recurrence.
Should I bathe my dog with regular shampoo for ringworm?
No. Regular shampoo won't kill the fungus and can spread spores. Use only the medicated antifungal shampoo your vet recommends, and follow the contact-time instructions on the label.
Preston Smith is the co-founder of Bully Sticks Central. He started BSC because he couldn't find single-ingredient, fully digestible chews he trusted to give his own dogs — no rawhide, no chemicals, no mystery ingredients. He writes about dog nutrition, safe chews, and the practical side of feeding dogs well. Read more about Preston →
This post was last updated at June 16, 2026 19:51
