Dog & cat health · Vet-reviewed guide

Cat Ear Mites: Signs and Treatment

That coffee-ground gunk in your cat's ears has a name, and it's contagious. Ear mites spread fast between pets, so treating one often means treating all of them.

Quick answer: Cat ear mites are tiny parasites that live in the ear canal, and the key thing to understand is that they are not an infection — so antibiotics do not treat them. They cause intense itching and a distinctive dark, crumbly, coffee-ground-like debris deep in the ear, and an affected cat scratches its ears and shakes its head constantly.

Ear mites are very contagious between pets, so if one animal in the home has them, the others usually need treating too. Because mites are a parasite, they need a vet-grade antiparasitic treatment, not the antibiotic ear drops used for an infection, and treating the wrong thing simply does not work. Confusingly, the same signs can come from an ear infection or heavy wax, which are treated differently, so a vet checking a swab under the microscope is the reliable way to know. This guide covers the signs, why mites are their own problem, and how they are treated.

Signs of ear mites

• Intense ear scratching and head shaking
• Dark, dry, crumbly debris deep in the ear that looks like coffee grounds
• Red, irritated ears, sometimes with a faint smell
• Scratches or scabs around the ears from clawing²

Why mites aren't an infection

Ear mites are living parasites feeding in the ear canal, not a bacterial or yeast infection.² That distinction decides the treatment: antibiotic or antifungal ear drops, which treat infections, do nothing to mites. Mites need a specific antiparasitic medication, and most mite treatments contain no antibiotic, so if an infection is also present it needs treating separately.

They spread between pets

Ear mites pass easily between cats and dogs in close contact, so when one pet is diagnosed, the others in the household usually need treatment at the same time to stop them passing back and forth.¹

Why it needs a vet to confirm

Mites, an ear infection, and simple heavy wax can all cause scratching and dark debris, but they are treated very differently. A vet confirms mites by looking at a swab of the debris under a microscope, and checks whether an infection is also present.² That is why guessing and buying over-the-counter drops so often fails. See our guide on ear mites vs wax and infection for the differences, and cat ear infection if it turns out to be an infection.

Treatment

A vet prescribes an effective antiparasitic, often a spot-on or ear medication, cleans the ears, and advises treating other pets.² Any prescribed medicine must come from a vet. See how our vet prescription service works. For safe at-home care while you arrange this, and what to avoid, see our ear mite home care guide.