Understanding How Dogs Get Mange: Causes, Symptoms, and Treatment Options

Mange isn’t always the culprit behind your dog’s itching—sometimes it really is just fleas. But when it comes to how dogs get mange, there are two distinct pathways your pet might contract this frustrating skin disease. The good news? It’s both preventable and treatable if caught early. Understanding how dogs acquire mange, what warning signs to watch for, and your treatment options can help you keep your furry friend healthy and comfortable.

The Two Types of Mites That Cause Mange in Dogs

When discussing how dogs get mange, it’s essential to understand that this skin condition stems from mites. All puppies and dogs naturally have mites living on their skin, but the real problem develops when these microscopic organisms overpopulate or become pathogenic.

The two primary culprits are demodectic mites and sarcoptic mites, each with different transmission patterns and severity levels. Demodectic mites naturally inhabit canine skin and typically only cause problems when a dog’s immune system weakens. Puppies under 12 to 18 months old are particularly vulnerable because their developing immune systems make them susceptible to mange when these mites are passed from their mother during early contact. The silver lining? Demodectic mange is not contagious to other dogs or humans, meaning your affected puppy won’t spread it to their littermates or your family.

Sarcoptic mange, commonly called scabies, tells a different story entirely. This form of mange is highly contagious to both dogs and humans, making it a more serious public health concern. It occurs when a dog comes into direct contact with the sarcoptes scabiei mite, which burrows beneath the skin’s surface.

How Dogs Contract and Spread Mange

Understanding how dogs get mange through specific transmission routes helps prevent infection. Demodectic mange typically develops without direct contact between dogs—it’s an opportunistic infection that emerges when a puppy’s immune defense fails to control naturally present mites.

Sarcoptic mange, however, spreads through active transmission. According to Dr. Mondrian Contreras, D.V.M., a veterinarian at Carol Stream Animal Hospital in Illinois, dogs living in areas with large populations of foxes commonly contract scabies through wildlife exposure. But that’s not the only risk factor. Stray dogs and pets not on preventative medication face heightened vulnerability. The real danger zones for sarcoptic mange transmission include puppy mills, animal shelters, and boarding facilities—any environment where multiple dogs live in close quarters. Even a single infected dog shedding mites can quickly infect an entire facility.

Interestingly, while sarcoptic mites can technically transmit to humans, they cannot complete their life cycle on human skin. A person accidentally exposed to mange mites might experience temporary redness and itching before the mites abandon their non-ideal host. Still, consulting a physician after potential exposure is wise.

Recognizing Mange Symptoms in Your Dog

Once you understand how dogs get mange, recognizing early symptoms becomes your next defense. The signs of canine mange can vary depending on which type your dog has contracted, but several red flags warrant immediate veterinary attention.

Excessive scratching and biting at the skin represents one of the most obvious indicators, though this symptom is less pronounced with demodectic mange. Hair loss (alopecia) often becomes noticeable as your dog’s constant grooming damages the coat. Red, irritated skin appears as inflammation increases, followed by scabs, skin lesions, and ulcerations. Yellow crusts and blackheads may also develop, particularly with demodectic mange.

The critical point: untreated mange progressively worsens. Your dog may eventually lose most or all of their hair through relentless scratching and biting. Secondary bacterial or yeast infections can develop, and in severe cases, these complications become life-threatening. This is why scheduling a veterinary appointment at the first sign of mange symptoms is absolutely essential.

Diagnosing Mange: What Your Vet Will Do

Diagnosing mange requires professional expertise. The most common diagnostic method involves microscopic examination of cells collected from your dog’s skin. For demodectic mange, the veterinarian looks for abnormally high numbers of mites—an overpopulation confirms the diagnosis.

Diagnosing sarcoptic mange presents greater challenges because sarcoptic mites burrow deep beneath the skin, whereas demodectic mites remain in hair follicles near the surface. While a skin scrape test is performed, the mites may not always be visible under magnification. In these cases, veterinarians base their diagnosis on clinical signs and symptoms alongside test results.

Treating Mange: Options and Costs

The encouraging news is that both types of mange respond well to treatment. Veterinarians typically prescribe topical or oral medications, sometimes combining both approaches. Anti-itch medications provide relief while the underlying infection resolves.

For demodectic mange, many vets prescribe oral ivermectin, a powerful medication that effectively eliminates the mites. However, this drug isn’t suitable for all dogs—herding breeds show particular sensitivity to ivermectin and require alternative oral treatments. Fortunately, several other oral medication options exist.

Managing sarcoptic mange requires additional precautions. All bedding, blankets, and toys your dog used during infection should be discarded to prevent reinfection and transmission.

Treatment costs typically range from $350 to $1,000 on average, depending on how severe the infection is, how quickly it was diagnosed, and whether complications like secondary bacterial or yeast infections require separate treatment. Pet insurance can help offset these expenses if your policy covers mange and the condition isn’t classified as pre-existing.

Preventing Mange in Your Dog

The best approach to managing mange is preventing it entirely. Dogs taking regular flea or tick-preventative medications significantly reduce their mange risk, particularly sarcoptic mange. Many of these preventative products contain isoxazoline, an ingredient effective against mites as well as fleas and ticks. Discussing preventative options with your veterinarian ensures your dog receives appropriate protection based on their lifestyle and risk factors.

Is Your Senior Dog at Risk?

While mange predominantly affects puppies and younger dogs with developing or compromised immune systems, older dogs aren’t completely exempt from risk. Senior dogs with weakened immune systems are equally susceptible to contracting mange as young puppies. Providing appropriate preventative care and maintaining regular veterinary checkups becomes even more important as your dog ages, ensuring early detection if mange does develop.

Understanding how dogs get mange empowers you to protect your pet through prevention, recognize symptoms early, and seek prompt treatment when needed.