Canine ear infections are most commonly caused
by bacteria or yeast. Ear mites , excessive hair,
moisture or wax, foreign bodies, allergies, and
hypothyroidism can all be contributing factors in the
development of an ear infection. Because the ear
canal in dogs is mostly vertical (unlike a human ear
canal that is horizontal), it is easy for debris and
moisture to be retained in the ear canal.
How Can I Tell if My Dog Has an Ear Infection?
The following symptoms may indicate that your dog
needs to have his ears checked by a veterinarian:
Scratching of the ear or area around the ear
Brown, yellow, or bloody discharge
Odor in the ear
Redness
Swelling
Crusts or scabs on inside of the outer ear
Hair loss around the ear
Rubbing of the ear and surrounding area on the floor
or furniture
Head shaking or head tilt
Loss of balance
Unusual eye movements
Walking in circles
Hearing loss
Which Dogs Are Prone to Ear Infections?
Dogs with allergies or those with non-erect outer
ears can be predisposed to developing ear
infections. Dogs that have excessive hair growth in
the ear canal may also be more susceptible to ear
infections.
How Are Ear Infections Diagnosed?
A veterinarian can usually diagnose an ear infection
by examining the ear canal and ear drum with a
magnifying ear cone similar to devices used on
people. This may require sedation, especially if the
dog is very painful. A sample of ear discharge may
be examined to look for bacteria, yeast, and
parasites . If a bacterial infection is suspected your
veterinarian may send a sample of the ear
discharge to a laboratory to see what bacteria is
causing the infection. Other diagnostics may be
done (such as checking for an underactive thyroid)
if your veterinarian feels they are indicated.
Because there are multiple causes and contributing
factors that cause ear infections in dogs, it is
important that an accurate diagnosis is obtained by
your veterinarian.
How Are Ear Infections Treated?
Most commonly, ear infections can be treated with
a professional cleaning followed by medication
given at home. Your veterinarian may prescribe
topical and/or oral medicine. It is not uncommon pets.webmd.com/dogs/dog-ear-infections
some dogs to have recurrent ear infections.