Otitis – how can I recognize an ear infection in my dog?

Ear infections in dogs are one of the most common reasons for visits to the veterinarian. However, the condition is often detected too late and not treated consistently. The anatomical structure of the ear canal in dogs and its length make it prone to inflammation. Due to various factors, some dog breeds are even more susceptible to inflammation in the ear area. Outer ear infections, also known as otitis externa, are the most common type. Middle and inner ear infections are less common. However, if not detected early, these can develop into chronic conditions that require intensive treatment.

INHALT
Causes Symptoms Diagnosis Treatment Prognosis Prophylaxis
Causes

There are many reasons why dogs get ear infections. A distinction is made between primary causes, predisposing factors, and contributing factors.

The following primary causes can be responsible for the development of an ear infection:

  • Foreign bodies (dirt, awns, sand, medication residues)
  • Ear mites
  • Tumors
  • Injuries to the ear canal (for example bite wounds)
  • Allergies
  • Autoimmune diseases
  • Viral or bacterial infections

Certain dog breeds are particularly prone to ear infections due to a specific predisposition. Inadequate or incorrect ear care by dog owners can also contribute to the development of ear infections. These factors promote inflammation but cannot cause it on their own.

These predisposing factors include:

  • Narrow ear canals (English Bulldog, Shar Pei)
  • Heavy sebum production (Cocker Spaniel)
  • Hairy ear canals (Poodles, Bolognese, Airedale Terriers, Schnauzers)
  • Heavy, drooping ears (Basset Hound, Bloodhound, Cocker Spaniel)
  • Improper cleaning or hair removal

If the ear infection is not detected and treated in time, there is a risk of secondary infection, which prevents rapid healing.

Contributing factors to the disease include:

  • Bacteria
  • Yeast

Symptoms

The first visible signs of an ear infection are usually itching and increased head shaking. Affected dogs scratch the affected ear or try to rub it against furniture or objects. A sudden tilting of the head in combination with severe itching can also be a sign of an ear infection. Middle ear infections in particular can be very painful and cause your dog to refuse food in order to avoid the pain when chewing. As the owner, you can recognize an infection of the outer ear by redness and thickening of the skin inside the ear and a discharge, which is usually very strong-smelling.

In cases of prolonged or chronic ear infections, affected dogs may become shy and show aggressive behavior due to the constant pain.

Diagram of ear infection in dogs
1 Pinna | 2 Descending part of the external auditory canal (reddened) | 3 Auricular cartilage | 4 Inflammatory secretion | 5 Horizontal part of the external auditory canal (severely reddened and swollen) | 6 Eardrum | 7 Malleus | 8 Incus | 9 Stapes | 10 Auditory organ | 11 Eustachian tube | 12 Tympanic cavity
Diagnosis

If the symptoms described above occur or you suspect an ear infection, you should always consult your veterinarian. Your detailed preliminary report is of particular interest to them, as it allows them to easily draw conclusions about possible causal factors.

A general veterinary examination is followed by a special skin examination to look for a possible underlying disease. In the case of an allergy, inflammatory changes are often found in the head, armpits, abdomen, and between the toes.

As part of a special ear examination, the ear canals of both ears are examined closely using an otoscope or video otoscope. Swab samples can also be taken and examined under a microscope in the laboratory. The type and amount of discharge can also give your veterinarian clues about certain pathogens.

Further laboratory tests may be necessary to detect one or more pathogens.

Oskar with inflamed ears
Treatment

Your veterinarian will first clean the affected ear and rinse it if necessary. Based on the diagnosis and laboratory tests, they will then select a suitable preparation for local treatment of the ear. It is important to follow the treatment regimen prescribed by your veterinarian exactly. Discontinuing the medication too early can cause the inflammation to flare up again or even become chronic. Talk to your veterinarian about a suitable treatment.

Prognosis

The chances of recovery always depend on the type and severity of the underlying disease and the duration of the ear infection. If appropriate treatment is started in good time, the chances of a full recovery are good. However, if complications such as hearing loss or meningitis have already occurred, the prognosis is much more cautious.

Prophylaxis

Complete protection against ear infections is impossible due to the countless factors. However, as a dog owner, you can do a lot to keep your dog's ears healthy and thus at least reduce the risk of infection.

Check your dog's ears regularly for redness or thickening of the skin. If your dog goes swimming often, dry their ears thoroughly afterwards. However, only clean the outside of your dog's ears with a paper tissue. Never insert cotton swabs into your dog's ear canal.

If you are unsure or suspect that something is wrong with your dog's ears, please consult your veterinarian immediately. Untreated or incorrectly treated ear infections can lead to serious complications such as deafness or meningitis.