Mange in Dogs: Types, Symptoms & Treatment
- Mange is a skin disease caused by microscopic mites. In dogs, the two main forms are demodectic mange (Demodex) and sarcoptic mange (canine scabies).
- Demodectic mange often causes patchy hair loss and mild redness, especially in puppies. It is usually not contagious to other pets or people.
- Sarcoptic mange causes intense itching, crusting, and rapid spread to other dogs. It can also cause temporary itchy bumps in people.
- Diagnosis usually starts with skin scrapings, but sarcoptic mange can be hard to confirm on testing, so your vet may recommend treatment based on exam findings.
- Many dogs improve well with modern isoxazoline medications, medicated baths, and treatment of secondary skin infection when needed.
What Is Mange?
Mange is a skin condition caused by microscopic mites. In dogs, the two most important types are demodectic mange and sarcoptic mange. They can look similar at first, but they behave very differently and do not carry the same contagious risk.
Demodectic mange is caused by Demodex mites that normally live in small numbers in canine hair follicles. Puppies usually get these mites from their mother during the first few days of life. Most dogs never have a problem, but if the immune system cannot keep mite numbers under control, hair loss, scaling, redness, and skin infection can develop. Demodectic mange is generally not contagious to other dogs or people.
Demodectic mange may be localized or generalized. Localized disease usually means 1 to 5 small patches of hair loss, often around the eyes, lips, or front legs, and many young dogs improve as their immune system matures. Generalized disease affects larger areas of the body, is more serious, and often needs medication plus follow-up testing.
Sarcoptic mange, also called canine scabies, is caused by Sarcoptes scabiei mites that burrow into the skin. This form is highly contagious between dogs and can cause temporary itchy skin lesions in people. Dogs with scabies are often intensely itchy, restless, and uncomfortable, with crusting on the ears, elbows, hocks, chest, and belly.
Signs of Mange in Dogs
- Patchy hair loss around the eyes, muzzle, lips, or front legs — common with localized demodectic mange
- Widespread hair loss over the body — more concerning for generalized demodectic mange or advanced scabies
- Severe itching, chewing, rubbing, or nonstop scratching — especially suggestive of sarcoptic mange
- Red, inflamed, or rash-like skin
- Crusts, scales, or scabs on the skin or ear margins
- Thickened or darkened skin in chronic cases
- Pustules, oozing, odor, or greasy skin from secondary bacterial or yeast infection
- Lesions on the elbows, hocks, chest, belly, and ear edges — a classic scabies pattern
- Swollen paws or inflamed foot pads in more severe demodectic mange
- Lethargy, enlarged lymph nodes, fever, or poor appetite in severe generalized disease
The pattern matters. Demodectic mange often starts with small, well-defined bald patches and may cause little itching at first. Sarcoptic mange usually causes much more intense itch, and many dogs seem miserable, especially at night or after getting warm. See your vet promptly if your dog has severe itching, spreading hair loss, open sores, bad odor, or signs of skin infection. If people or other pets in the home are also getting itchy, tell your vet right away because that raises concern for sarcoptic mange.
What Causes Mange?
Demodectic mange happens when naturally present Demodex mites overgrow. Puppies are more likely to develop it because their immune systems are still maturing. Localized demodicosis is common in young dogs and often improves on its own. Generalized demodicosis is more serious and may reflect an inherited tendency, especially in juvenile-onset cases.
When demodectic mange first appears in an adult dog, your vet may recommend looking for an underlying problem that weakens immune defenses. Examples include Cushing's disease, hypothyroidism, diabetes, cancer, malnutrition, or immunosuppressive medications. Adult-onset demodicosis is a clue, not a diagnosis by itself.
Sarcoptic mange is caused by Sarcoptes scabiei mites. Dogs usually catch it through direct contact with an infected dog, contaminated bedding, or occasionally wildlife such as foxes or coyotes. The severe itch comes from the dog's allergic reaction to the mites, their eggs, and their waste.
Some breeds appear more prone to demodectic mange than others, including Bulldogs, Shar-Peis, Staffordshire-type terriers, Boston Terriers, Pugs, and German Shepherd Dogs. That does not mean other breeds are protected. Any dog can develop mange, and mixed-breed dogs can be affected too.
How Is Mange Diagnosed?
Your vet usually starts with a skin exam and a skin scraping. For demodectic mange, the scraping often needs to be deep enough to sample hair follicles because Demodex mites live down in the follicles and sebaceous glands. Hair plucks may also help, especially in sensitive areas like around the eyes or feet.
Sarcoptic mange can be harder to confirm because the mites are often present in low numbers and may not show up on a scraping even when a dog truly has scabies. That means a negative test does not fully rule it out. If the itch pattern and exam findings fit, your vet may recommend a treatment trial and judge the response over the next few weeks.
Other tests may be needed when the skin is badly inflamed or not responding as expected. These can include cytology to look for bacteria or yeast, fungal testing to rule out ringworm, skin biopsy in selected cases, and bloodwork if adult-onset demodicosis raises concern for an underlying illness.
For generalized demodectic mange, follow-up matters. Your vet may repeat skin scrapings every 4 weeks and continue treatment until there are two consecutive negative tests or another endpoint based on the medication being used and your dog's clinical recovery.
Treatment Options for Mange
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Localized Demodex: Monitoring Plus Skin Support
- Veterinary exam and skin scraping or hair pluck
- Monitoring for young dogs with 1 to 5 small localized demodectic lesions
- Topical follicle-flushing shampoo such as benzoyl peroxide if your vet recommends it
- Topical antiseptic care for mild secondary infection when appropriate
- Recheck exam in about 4 weeks to confirm lesions are shrinking, not spreading
- Discussion of nutrition, parasite prevention, and whether any medications could be affecting immune function
Most Dogs: Isoxazoline-Based Treatment Plan
- Veterinary exam and diagnostic testing
- Prescription isoxazoline medication such as fluralaner, afoxolaner, or sarolaner when appropriate for your dog
- Treatment of secondary bacterial or yeast infection if present
- Medicated shampoo or mousse for crusting, odor, or folliculitis
- Monthly rechecks for generalized demodicosis until treatment goals are met
- Treatment of all in-contact dogs if sarcoptic mange is suspected or confirmed
- Washing bedding, collars, and grooming tools for scabies cases
Severe, Adult-Onset, or Refractory Cases
- Dermatology referral or advanced primary-care workup
- Skin cytology, culture, biopsy, or additional parasite testing when needed
- Bloodwork and endocrine testing to look for underlying disease in adult-onset demodicosis
- Longer treatment course with repeat monitoring
- Culture-guided antibiotics for deep pyoderma or furunculosis when present
- Pain control, anti-itch support, and wound-care planning for severe skin damage
- Management of underlying disease contributing to recurrence
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Mange
Bring these questions to your vet appointment to get the most out of your visit.
- Does my dog's exam fit demodectic mange, sarcoptic mange, or another skin problem like allergies or ringworm?
- Is this a localized case we can monitor, or does it look generalized and more likely to need medication now?
- Which tests do you recommend today, and what does a negative skin scraping mean in this case?
- Would an isoxazoline be appropriate for my dog, and are there any reasons it may not be the best fit?
- Does my dog also have a bacterial or yeast skin infection that needs separate treatment?
- If this is sarcoptic mange, do my other dogs need treatment too, even if they are not itchy yet?
- If my adult dog has demodectic mange, should we screen for an underlying illness or medication effect?
- What signs would mean the treatment plan is not working and we should recheck sooner?
Preventing and Managing Mange
Prevention depends on the type of mange. For sarcoptic mange, year-round parasite prevention may lower risk, especially in dogs that go to daycare, boarding, grooming, dog parks, or areas with wildlife exposure. If one dog in the home has scabies, your vet may recommend treating all exposed dogs and washing bedding, harnesses, sweaters, and grooming tools.
For demodectic mange, prevention is less about avoiding exposure and more about supporting skin and immune health. Keep up with routine parasite prevention, nutrition, and follow-up care for any chronic medical condition. If your dog develops adult-onset demodicosis, ask your vet whether more testing is needed.
Do not stop treatment early because the skin looks better. Mange often improves in stages: itching may ease first, then redness and infection settle, and hair regrowth comes later. Stopping too soon can increase the chance of relapse, especially with generalized demodectic mange.
If your dog has generalized demodicosis, many dermatology references advise against breeding because inherited immune factors may play a role. Your vet can help you decide what follow-up schedule makes sense for your dog's age, severity, and response to treatment.