Dogs get ear mites almost exclusively through direct physical contact with an infected animal. The mite responsible, Otodectes cynotis, spreads when dogs touch heads, play, or sleep close to another dog, cat, or ferret that’s already carrying them. A mother dog commonly passes mites to her puppies during nursing. While ear mites account for roughly 6% of outer ear infections in dogs (compared to over 66% in cats), they’re still one of the most contagious parasites your dog can pick up.
How Dogs Pick Up Ear Mites
Ear mites can’t jump or fly. They crawl from one animal to another during close physical contact, which is why multi-pet households are especially vulnerable. If one dog in your home has mites, every dog, cat, and ferret in the house likely needs treatment at the same time. Dogs and cats pass mites back and forth easily, so a cat that roams outdoors can bring mites home to an indoor dog.
Because mite survival off a host is limited, picking them up from bedding or carpet is far less common than catching them directly from another animal. The real risk factor isn’t a dirty environment. It’s proximity to an infested pet.
Which Dogs Are Most at Risk
Young dogs and dogs with outdoor access are the most likely to get ear mites. Puppies frequently pick them up from their mother in the first weeks of life, before they’ve ever left the house. Free-roaming dogs that interact with stray or feral animals face higher exposure simply because they encounter more potential carriers. No specific breed or sex is more susceptible than another. The deciding factor is lifestyle: how much contact your dog has with animals whose parasite status you don’t know.
What Ear Mites Actually Are
Otodectes cynotis is a tiny, eight-legged parasite that lives primarily in the ear canal, feeding on skin debris and oils. The mites go through five life stages: egg, larva, two nymph stages, and adult. The entire cycle from egg to egg-laying adult takes 18 to 28 days, which means a small number of mites can become a full-blown infestation within a month. All of these stages happen on the dog, mostly inside the ear, though mites occasionally wander onto the skin around the head and neck.
Signs of an Ear Mite Infestation
The hallmark sign is a dry, dark, crumbly ear discharge that looks like coffee grounds. You’ll typically notice it when you lift your dog’s ear flap. Other common signs include:
- Intense scratching at one or both ears
- Head shaking that’s frequent and vigorous
- Redness or irritation inside the ear canal
- A strong odor from the ears, especially if a secondary bacterial or yeast infection develops
Persistent scratching can cause wounds around the ears and even burst blood vessels in the ear flap, creating a puffy, swollen condition called an aural hematoma. If your dog is pawing at their ears constantly, it’s worth getting them checked before that kind of damage sets in.
How Ear Mites Are Confirmed
A vet can often spot ear mites during a routine ear exam using an otoscope, a lighted instrument that magnifies the inside of the ear canal. The mites are tiny white specks that move against the dark background of debris. For a definitive answer, the vet takes a swab of the ear discharge, mixes it with mineral oil on a slide, and examines it under a microscope. Mites and their eggs are clearly visible at low magnification. This step matters because bacterial and yeast ear infections can look similar to the naked eye, and each requires different treatment.
Treatment and What to Expect
Modern treatment is simpler than it used to be. Many of the monthly flea and tick chewables that dogs already take belong to a drug class that’s also effective against ear mites. Your vet may recommend one of these oral or topical products, which kill mites systemically through the bloodstream rather than requiring you to put drops directly into an inflamed, painful ear. In some cases, a vet will still prescribe ear drops or a one-time topical medication applied between the shoulder blades.
Because the mite life cycle takes up to 28 days, treatment often needs to cover at least that window to catch newly hatching mites that weren’t killed in the first round. Every pet in the household should be treated simultaneously. If you treat one dog but skip the cat, the cat will reinfect the dog within days.
You should also wash bedding and any shared blankets during treatment. While mites don’t survive long without a host, cleaning removes any stragglers and the accumulated debris that can reintroduce irritation to healing ears.
Can Humans Catch Ear Mites?
Ear mites are primarily a concern between pets. In rare cases, people handling heavily infested animals develop a mild, temporary skin irritation, typically itchy bumps on the arms or hands. The mites cannot establish a lasting infestation on human skin, so these reactions resolve on their own once the pets in the household are treated.