What Mange Looks Like on Puppies, and How It's Treated

You're cuddling your new puppy and notice a bald spot by one eye. A week later it's bigger, and the skin is a bit scaly. It's natural to worry, and mange is often the first thing owners think of.

In puppies, it's usually the milder kind and very treatable. But which kind it is matters, because one type is harmless to you and the other isn't. Here's how to tell what you're looking at and what to do next.

What mange looks like on a puppy

The look varies with the type of mite. Most puppies with mange have one of two kinds, and they look quite different.

Demodectic mange in puppies

This is by far the most common mange in young dogs. It's caused by Demodex mites that live in the hair follicles of every dog. In a puppy with an immature immune system, they can multiply and cause bald patches.

Localized demodectic mange typically looks like one to five small patches, usually on the face and front legs. You'll see:

• Thin or missing hair, often in a round or ragged patch
• Pink, red or gray skin, sometimes slightly scaly
• Patches around the eyes, lips, chin or forelegs
• Little or no itching, with a puppy that still plays and eats normally

Generalized demodectic mange is more serious. The patches merge and cover large areas, including the trunk and the paws. The skin may be greasy, crusty or smelly. Infected paws can swell and hurt. You can read more in our full guide to demodectic mange.

Sarcoptic mange (scabies) in puppies

Scabies looks different because the itching is the headline. The puppy scratches and chews hard, often with little warning. The skin shows tiny red bumps, then crusts. The ear tips, elbows and belly are early targets, and the hair falls out as the puppy scratches. A puppy with scabies can quickly become thin and miserable. See sarcoptic mange for the full picture.

Other things that look like mange

Ringworm, a fungal infection, makes round bald patches and also spreads to people. Bacterial skin infection (puppy pyoderma) causes pimples and crusts. Flea bites cause itching and scabs near the tail base. Even a scrape from rough play can leave a bald spot. A vet can tell which one you're dealing with.

Why puppies get mange

Puppies get demodectic mange because their immune systems are still developing. The mites came from their mother in the first days of life. The tendency can be inherited, so it's seen more often in some breeds and some litters. Pugs, Bulldogs, French Bulldogs, Boston Terriers, Shar-Peis, Dobermans and Dachshunds are examples.

Stress, poor nutrition, worms and other illnesses can all tip the balance. A puppy that has just moved to a new home, changed food and had a round of vaccines is under a lot of strain. That's often when patches appear.

Scabies is different. The puppy catches it from another dog or a place that dog has been, such as a shelter, a pet store, a kennel, a breeder's yard or a visit from a fox. Signs may take 10 days to 8 weeks to appear.

What the first few weeks look like

Owners often ask how fast mange moves. Here's a rough guide, and it varies a lot from puppy to puppy.

Week by week with demodex

In the first week you might see a single patch the size of a coin. Over the second and third weeks, a small patch can grow a little, or a second one can appear nearby. If the puppy is healthy, many patches stay put and then shrink. A puppy with generalized disease shows a different pattern: patches that join up, skin that turns oily or crusty, and paws that start to look red and puffy within a month.

Week by week with scabies

Scabies moves faster. Within days of the first scratch, a puppy can have scabs on its ear tips and elbows. Within two to three weeks, untreated, it can have crusts across the belly and legs, and it may stop eating well because it's so uncomfortable.

Signs that a puppy is more than skin-deep sick

Skin mange on its own shouldn't make a puppy feel unwell. If your puppy is also quiet, hot to the touch, off its food or has swollen glands under the jaw, a skin infection may be spreading. Take it to the vet that day. Small puppies lose body heat and fluids quickly, so they can go downhill faster than an adult dog.

Which puppies are most at risk

Any puppy can get mange, but some face higher odds.

• Puppies from litters where a sibling or the mother had demodex
• Short-faced and wrinkled breeds such as Pugs, Bulldogs and Shar-Peis
• Puppies from crowded or stressful places, like puppy mills, pet stores and shelters
• Puppies with heavy worm burdens or poor early nutrition
• Puppies on steroid medicine or recovering from another illness

If you're buying a puppy, ask the breeder about skin problems in the parents and earlier litters. Healthy, well-kept parents and clean conditions lower the odds. If you've already got the puppy and mange turns up, tell the breeder or rescue. Other puppies from the same litter may need a check.

How vets confirm it

The vet will look at the skin, ask where the puppy came from and take a skin scraping. For demodex, they'll squeeze and scrape deeper to reach the follicles, then count mites under the microscope. A few mites are normal. A lot of them, along with the signs, confirms mange. Scabies is harder to prove, because the mites are few and hidden, so a negative test doesn't rule it out. The vet may treat on suspicion if the signs fit.

You can help by bringing details: when the patches started, whether anything has changed in the home and the puppy's vaccination, worming and food history.

How to treat mange in puppies

Treating localized patches

For a healthy puppy with a couple of small patches, many vets simply watch and recheck every 2 to 4 weeks. Most clear as the immune system matures, usually by 12 to 18 months. Some vets add a gentle medicated wash or a mild topical.

Treating generalized mange

Widespread demodex needs months of anti-mite medicine. Isoxazoline chews and macrocyclic lactones such as milbemycin or moxidectin are the usual choices. Treatment goes on until two skin scrapings in a row, a month apart, are negative. Bacterial infections need antibiotics, and medicated baths help the skin recover. Your vet will pick products suited to your puppy's age and size. Collies and other herding breeds may need a gene test before certain drugs.

Treating scabies

Scabies is treated with spot-on or oral medicines such as selamectin, moxidectin or an isoxazoline, depending on age and weight. Every dog in the house should be treated. Wash bedding, collars and soft toys in hot water. Most puppies feel better in about two weeks, and recovery takes 6 to 8 weeks.

How to treat puppy mange at home

Honestly, you can't cure mange at home. What you can do is give the prescribed treatment well and look after the puppy while it works.

What helps

• Give every dose on schedule and finish the course, even if the skin looks good
• Feed a complete puppy food and keep worming and vaccines up to date
• Keep bedding clean and washed weekly
• Stop scratching and licking with a soft cone or a snug baby onesie (ask your vet first)
• Keep the puppy calm, warm and well rested
• Keep it away from other dogs if scabies is possible

What to avoid

Skip the online recipes. Oils, vinegar, borax, bleach, kerosene and motor oil don't kill follicle mites and can burn skin or poison a puppy that licks it off. Don't use an adult dog's flea or mange product, and never use a product made for cats. Puppies are much more sensitive to doses than adult dogs. If you want to try a supportive step, ask your vet whether a gentle medicated shampoo is suitable.

Getting a puppy through treatment

Mange takes weeks to months, and the skin often looks worse before it looks better. Be patient. Take a weekly photo in the same light so you can see the trend, because day-to-day changes are hard to spot. Hair regrowth usually follows a month or two after the mites are controlled.

Keep every recheck appointment. Relapses are most common before 12 to 18 months of age. A puppy with generalized disease shouldn't be bred when it grows up, and the same goes for its parents, because the tendency can be inherited. Tell the breeder, since other pups in the litter may be affected.

For another painful, fast-growing skin problem that can look alarming, see hot spots on dogs.

Keeping your puppy comfortable

A puppy with mange still needs normal puppy life. Keep up gentle play, short walks and socializing in safe places, but skip busy dog parks, daycare and group classes until the vet says scabies is ruled out. Keep the puppy warm after medicated baths, because small dogs chill fast. Dry them thoroughly with a towel and a warm room, not a hot hair dryer, which can burn sore skin.

Mealtimes matter too. A complete puppy food gives the protein and fatty acids that skin and coat need. Don't add supplements or change food suddenly without asking your vet, because a tummy upset on top of mange makes recovery harder. A stable routine, plenty of sleep and gentle handling all help a young immune system do its job.

When to see a vet

Book a visit as soon as you see bald, scaly or crusty skin on a puppy. Don't wait to see if it clears. Early cases are easier to manage and it rules out ringworm and scabies.

Go the same day if your puppy has:

• Patches spreading fast, or sores that ooze or smell
• Swollen, painful paws or a limp
• Fever, lethargy or poor appetite
• Skin problems at less than 8 weeks of age
• Relentless itching

For broader advice on your puppy's skin and coat, see our skin and coat hub or the main guide to mange in dogs.