Sarcoptic Mange (Scabies) in Dogs: Symptoms, Causes & Treatment

What Is Sarcoptic Mange?

Sarcoptic mange, commonly called scabies, is a highly contagious skin condition caused by the mite Sarcoptes scabiei var. canis. These microscopic mites burrow into the skin and create tunnels where they live and lay eggs. The resulting allergic reaction causes intense, often relentless itching.

Unlike demodectic mange (caused by mites that normally live on dogs), sarcoptic mites are parasites that infest the skin and can spread easily between dogs, and occasionally to other animals or humans. Sarcoptic mange can affect dogs of any age or breed and is seen worldwide.

Prompt diagnosis and treatment are important to relieve suffering and prevent spread to other pets and people.

Symptoms of Sarcoptic Mange in Dogs

Early Signs

• Intense itching (pruritus), often worse at night
• Redness and small bumps, especially on ear margins, elbows, hocks, abdomen, and chest
• Hair loss from scratching and chewing
• Restlessness and difficulty sleeping
• Rash that may appear within days of exposure

Progressive Symptoms

• Thickening and darkening of the skin (lichenification, hyperpigmentation)
• Crusts and scales from chronic trauma
• Secondary bacterial infection (pyoderma)
• "Pinnal-pedal reflex"—many dogs scratch the ear when the ear margin is rubbed (suggestive of scabies)
• Weight loss in severe cases due to constant discomfort

Emergency Signs

• Severe skin infection with fever or lethargy
• Extreme self-trauma causing open wounds
• Debilitation from prolonged untreated disease

What Causes Sarcoptic Mange in Dogs?

Sarcoptes scabiei var. canis is a burrowing mite that infests the epidermis. Transmission occurs through:

• Direct contact with an infested dog (most common)
• Brief contact—even short encounters (e.g., at a park, boarding facility, or shelter) can spread mites
• Indirect contact—mites can survive off the host for 2–4 days in the environment, so shared bedding or brushes may transmit them (less common)

Breeds Most at Risk

Sarcoptic mange can affect any breed. No breed is inherently more susceptible; risk is driven by exposure. Dogs with high exposure to other dogs (e.g., rescues, show dogs, daycare attendees) are at greater risk.

How Sarcoptic Mange Is Diagnosed

Diagnosis can be challenging because mites are hard to find:

• Skin scrapings—superficial scrapings of affected areas (especially ear margins, elbows); mites are found in only about 20–50% of cases
• Clinical signs—characteristic distribution (ear margins, elbows, hocks) and intense itch can strongly suggest scabies
• Therapeutic trial—if scrapings are negative but scabies is suspected, a trial with a scabicidal medication can confirm the diagnosis when the dog improves
• Pinnal-pedal reflex—scratching when the ear edge is rubbed supports the diagnosis
• Rule-outs—allergies, flea allergy, and other skin conditions may need to be considered

Treatment Options for Sarcoptic Mange

Medical Management

• Isoxazoline parasiticides—Bravecto, NexGard, Simparica, Credelio (used off-label for scabies; very effective)
• Selamectin (Revolution)—topical treatment applied monthly
• Ivermectin—oral or injectable; effective but requires proper dosing (MDR1-sensitive breeds need caution)
• Lime sulfur dips—traditional treatment; can be effective but messy and may require multiple applications
• Antibiotics—for secondary bacterial infection
• Anti-itch medication—to provide relief during treatment (itching may persist for days after mites are killed)

Surgical Options

Surgery is not indicated for sarcoptic mange.

Alternative/Supportive Therapies

• Medicated baths for comfort and skin hygiene
• Environmental decontamination—washing bedding, vacuuming (mites survive briefly off host)

At-Home Care

• Treat all dogs in the household to prevent reinfestation
• Wash bedding and clean the environment
• Limit contact with other dogs until treatment is complete
• Complete the full treatment as directed

Prognosis & Life Expectancy

Sarcoptic mange is curable. With appropriate treatment, most dogs recover fully within 2–4 weeks. It does not affect life expectancy. Some dogs may have residual itching for a short time after mites are eliminated.

Prevention

• Avoid contact with infested dogs or unknown dogs with skin issues
• Quarantine and treat new dogs before introducing them to the household
• Use preventive parasiticides that have activity against sarcoptic mites (some flea/tick products)
• Practice good hygiene in multi-dog environments

Cost of Treatment

• Diagnosis: $50–$150
• Isoxazoline medication (one to two doses): $50–$100
• Other treatments (ivermectin, dips): $30–$80
• Antibiotics (if needed): $30–$80
• Environmental cleaning: variable

Frequently Asked Questions