By the end of summer, ears have had a hard few months. Lake swims, the garden sprinkler, warm humid air, seed heads in tall grass — all of it lands in the one place most of us check last.
A dog's ear canal is shaped like an L: it runs down, then turns inward toward the eardrum. That bend is brilliant at protecting the delicate parts and terrible at letting moisture out. Warm, dark and damp is exactly what yeast and bacteria are waiting for.
Ten seconds, once a week
Lift the ear flap and look. A healthy ear is pale pink, holds only a little wax, and smells of almost nothing. Then simply lean in and breathe. Smell is the earliest warning sign there is — that sour, yeasty note usually turns up days before the ear looks red.
Signs that mean a call to the vet
- Head shaking, a tilted head, or scratching that will not stop
- Redness, swelling, or flinching when you touch the base of the ear
- Brown, yellow or bloody discharge, or a sharp unpleasant smell
- Dark, crumbly debris that looks like coffee grounds — in cats this often means ear mites
- Sudden loss of balance, a head that stays tilted, or a pet that stops responding to sounds
Resist the urge to reach for last year's leftover drops. If the eardrum is damaged, some medications can do real harm, and your vet needs to look inside the canal before anything goes in. One swab under a microscope tells them whether it is yeast, bacteria or mites — three problems with three different treatments.
Cleaning, but only when it is needed
Healthy ears clean themselves. Reach for the cleaner when you see build-up, not on a fixed schedule — washing a clean ear every week irritates the canal and can create the very problem you were trying to avoid.
If you do clean: use a cleaner your vet recommends, fill the canal, then massage the base of the ear for twenty or thirty seconds until you hear a soft squelch. Let your dog or cat shake their head — that is what brings the debris up. Wipe the visible part with gauze or a cotton pad, and stop there.
- Never use cotton buds. They push debris deeper and can injure the eardrum.
- No alcohol, no hydrogen peroxide, no vinegar — they sting inflamed skin.
- Do not clean an ear that is red or painful until your vet has seen it.
After water, two minutes of drying
Dry the ears after every swim and every bath. Cotton wool at the entrance of the canal is enough — never push anything down it. Floppy-eared dogs need this most: the flap works like a lid and keeps the canal humid for hours. Thick hair at the canal opening blocks airflow too, so ask your groomer to keep it thinned.
When it keeps coming back
Repeat infections are rarely just about hygiene. Allergies are involved in up to 43% of ear infection cases, and among dogs with food allergies, 65-80% end up with ear problems. If the ear clears and relapses a few weeks later, the ear is the symptom — the cause usually sits in skin, diet or environment, and that is worth investigating properly.
Ten seconds a week, and a towel after swimming. That is most of ear care, and it catches trouble while it is still a smell rather than a sleepless night.
