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Dog Ear Infections


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The ears are a common problem area for dogs. Some conditions, such as ear mites, can be easily cured with simple treatments, while others, like recurrent infections secondary to allergies, may need long term management with pet medications.

" If you suspect that your dog has an ear infection, take him to the veterinarian."


Ear Anatomy and Symptoms

Most ear infections affect only the outer portion of a dog's ear - the flap, also called the pinna, and the part of the canal that lies on the outside of the ear drum. A dog with an outer ear infection typically will:

  • Scratch his ears
  • Shake his head
  • Have an abnormal discharge and/or odor from his ears
  • Have red skin and self-inflicted wounds in or around the ears

If an ear infection has broken through the ear drum and affects the middle ear, all of the above symptoms may be present, but the dog may also have nerve damage, which can cause:

  • A droop to one side of the face
  • A sunken eye with a raised third eyelid and a small pupil
  • Difficulty swallowing

Inner ear infections may also cause the following additional symptoms:

  • A head tilt
  • Circling
  • Difficulty standing
  • Abnormal eye movements

What Causes an Ear Infection?

Most ear infections are caused by bacteria, yeast or ear mites. Ear mites are parasitic insects that are spread from one individual to another, but yeast and bacterial infections are usually caused by an overgrowth of the normal organisms that are present on a dog's skin. This overgrowth can occur for any number of reasons, including allergies, anatomy (e.g., pendulous ears), disruption of the normal skin barrier (e.g., prolonged dampness), or a foreign body or tumor in the ear.

Veterinary Care

If you suspect that your dog has an ear infection, take him to the veterinarian. The vet will need to do two important things before coming up with an appropriate treatment plan:

  1. Determine whether mites, yeast and/or bacteria are involved by looking at a sample of discharge under the microscope
  2. Determine whether or not your dog's ear drum has been ruptured by looking in his ear with an otoscope

If an ear infection is especially severe or has become a recurring problem, additional diagnostic tests may be necessary.

Your vet will recommend an appropriate ear cleaner for home use and if necessary, prescribe topical or systemic medications based on the results of the exam and diagnostic tests. Many vets will thoroughly clean a dog's ears and apply the first dose of medicine before sending your pet home. If the middle or inner ear is involved, surgery or long-term antibiotic therapy may be necessary.

Frontline Plus

Ear mites are widely common in puppies and pets that have recently been adopted from a group setting, such as a shelter. You might be able to diagnose a case of mites at home and avoid a trip to the veterinarian by gently swabbing out a sample of the discharge (it often looks like coffee grounds) and placing it on a dark sheet of paper. If you see tiny white specks moving around (use a magnifying glass if you have one), those are mites. Using an ear cleaner, followed by an ear mite medication, and applying a dose of Frontline Plus for Dogs to the skin should get rid of the ear mites if you follow the directions closely. All of the animals in the household may need to be treated if they have been in contact with one another.

Home Care

Most ear infections require continued care at home. If you are supposed to use an ear cleaner and/or medication, do so even if your pet doesn't seem to like it. Finish the entire course of oral antibiotics or other medications that have been prescribed even if your dog looks better after a few days. If your vet has recommended a recheck, do not be tempted to skip it. Ear infections have a tendency to recur unless underlying problems, like allergies, are also dealt with.

In some cases, routine ear cleaning to remove excess wax will reduce the likelihood of an infection developing. Try an ear drying solution like Vedco Astringent if dampness is a persistent problem.


The above is provided for information purposes only and should not be used for the diagnosis or treatment of any condition. This information does not cover all possible variables, conditions, reactions, or risks relating to any topic, medication, or product and should not be considered complete. Certain products or medications may have risks and you should always consult your local veterinarian concerning the treatment of your pet. Any trademarks are the property of their respective owners.


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