Otitis externa, or infection of the ear canal, is a common condition in dogs and cats.

It may be caused by a variety of microorganisms, such as ear mites (Otodectes cynσtts), bacteria and fungi.The shape of the pinna and the presence of hair may predispose to infection by creating a hot airless environment within the ear canal. Infection results in pain, aural discharge, self-trauma and. in some cases, aural haematoma.

The ear is the organ of hearing and balance. Receptor cells, adapted to respond to sound waves and to the movement of the body, are located within the inner ear. z∖ll mammals have a pair of ears located on the dorsal part of the head. Each ear can be divided into three parts:

1. External ear

2. Middleear

J. Innerear.