Health & Wellbeing

Dog Ear Infections: Early Signs Every Owner Should Spot

How to recognise and prevent otitis externa before it becomes serious.

By Dr. Hannah Wickes · Published 7 October 2026
Dog Ear Infections: Early Signs Every Owner Should Spot

Understanding Canine Ear Infections

Otitis externa — inflammation of the outer ear canal — affects roughly 20% of dogs. Floppy-eared breeds like Cocker Spaniels and Basset Hounds are at highest risk.

Early Warning Signs

  • Head shaking or tilting
  • Scratching at the ears
  • Redness or swelling in the ear canal
  • Unpleasant odour from the ears
  • Dark discharge or crusting

Prevention Is Key

Weekly ear checks catch problems early. Use a vet-approved ear cleaner — never insert cotton buds deep into the canal. After swimming or bathing, gently dry the outer ear.

When to See the Vet

If your dog shows signs for more than 24 hours, or if there's bloody discharge, seek veterinary care promptly. Untreated infections can progress to the middle ear, causing balance issues and even hearing loss.

Breed-Specific Risks

Dogs with pendulous ears, hairy ear canals, or allergies need extra vigilance. Regular grooming and ear plucking (for hairy breeds) reduce moisture buildup.

Written by

Dr. Hannah Wickes

All our authors care for dogs every day — read more of their work on the authors page.