Head shaking, scratching, and a funky smell from your dog's ears aren't just annoying habits — they can signal a painful ear infection. Here's how to spot the early signs, why winter dampness makes things worse, and what actually helps.
Why Winter Is Prime Time for Ear Trouble
Dogs' ear canals are naturally warm, humid, and a little hard to see into — perfect conditions for yeast and bacteria to multiply when moisture gets trapped. In winter, that moisture comes from puddles, wet grass, and rain-soaked walks rather than swimming, but the effect is the same. Dogs with floppy ears (think Cocker Spaniels, Labradors, and Basset Hounds) are especially prone because their ear flaps trap in humidity and restrict airflow. Add in extra dirt and mud tracked home from winter walks, and the ear canal becomes a breeding ground for infection.
Signs You Shouldn't Ignore
Ear infections rarely appear out of nowhere — there are usually early warning signs before things get uncomfortable enough for a dog to need veterinary treatment. Watch for:
Frequent head shaking or tilting to one side, scratching or pawing at the ear, a noticeable odour (often described as yeasty or musty), redness or swelling inside the ear flap, dark discharge that looks like coffee grounds, and sensitivity when you touch the ears. If your dog is rubbing their head along the carpet or furniture, that's another strong signal something is bothering them.
What's Actually Causing It
Most ear infections fall into one of two camps: yeast (Malassezia) or bacterial, and many cases involve a mix of both. Moisture is the biggest trigger, but allergies play a huge role too — dogs with food sensitivities or environmental allergies (grass, dust mites, mould) often get recurring ear flare-ups because inflammation from allergies changes the ear canal environment and makes it easier for yeast to take hold. Breed and ear shape matter as well: dogs with narrow ear canals or heavy hair growth inside the ear are more prone to trapped moisture and wax build-up.
Prevention Starts With Drying, Not Just Cleaning
A lot of owners assume more cleaning is the answer, but over-cleaning can actually irritate the ear canal and strip away its natural protective barrier. The better habit is thorough drying after anything wet — a quick towel dry of the ear flap after rainy walks, and for dogs prone to infections, a vet-recommended drying solution after exposure to moisture. Check ears weekly as part of a regular grooming routine so you notice changes early, rather than waiting until your dog is clearly uncomfortable. Trimming excess hair around the ear opening (for breeds that need it) also helps airflow.
When to See the Vet
Mild redness or a small amount of wax is normal and not cause for alarm. But if you notice a strong odour, dark or excessive discharge, visible swelling, or your dog is clearly in pain when their ear is touched, it's time for a vet visit rather than a home remedy. Untreated ear infections can progress and become more painful and expensive to treat, and chronic, recurring infections are often a sign of an underlying allergy that's worth investigating properly. Your vet can take a swab to identify whether it's yeast, bacteria, or both, and prescribe the right treatment rather than guessing.
The Takeaway
Ear infections are common, especially through the wetter months, but they're also one of the more preventable health issues dogs face. A simple habit of drying ears after wet walks, checking them weekly, and acting early on head shaking or scratching can save your dog discomfort and save you a vet bill down the track. Your dog can't tell you their ears are bothering them in words — but the signs are there if you know what to look for.