Dog Ear Mites and Otitis Externa in Puppies

Ear mites (Otodectes cynotis) cause intense itching and discomfort in puppies and kittens, and are highly contagious between companion animals sharing a household.

Key Facts

Otodectes cynotis mites live in the ear canal, feeding on skin debris and causing intense pruritus
Infestation produces a characteristic dark, crumbly discharge that fills the ear canal
Ear mites are highly contagious between dogs and cats and spread through direct contact
Modern systemic parasiticides including selamectin, milbemycin, and isoxazolines treat ear mites effectively
Secondary bacterial and yeast infections from mite-induced inflammation are common without treatment

Welfare Considerations

Ear mite infestation causes intense, persistent pruritus that drives head shaking, ear scratching, and self-trauma in affected animals. Young animals are particularly susceptible, and heavily infested puppies and kittens scratch until secondary wounds develop around the pinnae. The discomfort is continuous while mites are present. Modern treatments provide rapid resolution, but untreated animals experience weeks to months of discomfort. In multi-pet households, all animals must be treated simultaneously as re-infestation from untreated contacts defeats individual treatment. Regular parasite prevention that includes ear mite coverage eliminates the risk in preventively treated animals.

What You Can Do

Treat all in-contact pets simultaneously when ear mites are diagnosed in any household animal
Use a modern systemic product that provides ear mite coverage as part of routine parasite prevention
Seek veterinary assessment to differentiate ear mites from other ear disease causes requiring different treatment
Clean the ear canal thoroughly as part of mite treatment to remove debris and allow treatment contact