What does a bacterial infection look like in a dog's ear?

Your dog’s constant head-shaking and pawing at their ear isn’t just a quirky habit—it might be a cry for help. Bacterial ear infections are common, especially in floppy-eared breeds like Cocker Spaniels or Basset Hounds, and catching them early can save your pup from a lot of discomfort. Knowing what to look for is the first step.

Start with the basics: check the ear canal. A healthy ear should be pale pink and dry, maybe with a little wax. But a bacterial infection often turns that area red or even purplish, swollen enough to make the opening look smaller. In damp climates like the Pacific Northwest, where moisture lingers after rain walks, you might notice a slimy, yellowish discharge—thicker than normal wax, sometimes with a foul, yeasty smell that sticks to your fingers even after a quick wipe.

Watch for behavioral clues too. Does your dog flinch when you brush near their ear? That sensitivity is a classic sign. Some dogs rub their heads against furniture or the carpet, trying to relieve the itch. In the UK, where dog grooming standards are strict, professional groomers often spot infections first—they’ll mention if a dog’s ear feels hot to the touch, another red flag.

Certain breeds are more prone, but any dog can get one. Water-loving pups like Labradors who swim in lakes or backyard pools risk trapped moisture, a breeding ground for bacteria. In Mediterranean countries, where dogs often lounge in the sun, excessive heat can irritate ears too, making them more susceptible. Even a small scratch from a rogue twig during a hike can let bacteria sneak in.

Don’t ignore the signs—left untreated, infections can spread to the middle or inner ear, causing pain, hearing loss, or even balance issues. In Germany, animal welfare laws require pet owners to seek timely veterinary care for preventable conditions like this, so a quick trip to the vet isn’t just kind—it’s responsible. They’ll likely clean the ear and prescribe antibiotic drops, maybe a steroid to reduce swelling.

Prevention matters. After baths or swims, dry your dog’s ears with a soft cloth or cotton ball—avoid Q-tips, which can push debris deeper. In Scandinavia, where winter brings snow and salt, owners wipe their dogs’ ears after walks to remove irritants. Regular checks, especially if your dog has long ears or lots of ear hair, can catch early signs before they escalate.

Your dog can’t tell you their ear hurts, but their body language will. By learning to spot the redness, discharge, and discomfort of a bacterial infection, you’ll keep those ears healthy and your pup happy—ready for more head scratches and ear rubs, the ones they actually enjoy.