The ear is divided into four parts:
- Pinna - the part outside the head
- External ear canal
- Middle ear - found on the inside of the eardrum
- Inner ear - consists of tubes and nerve structures that transmit sound to the brain. The inner ear also helps control your dog’s balance.
Ear inflammations are common in dogs and have many causes. Dogs, like bloodhounds, with droopy ears and/or a great deal of hair, like the English sheepdog, in the ear canal seem to have the most problems with ear inflammations. These characteristics plus the warm and enclosed nature of the ear canal provide an excellent environment for infectious agents that cause inflammation.
Causes
Bacteria, fungi and ear mites are common causes of ear inflammation in dogs. Allergies, seborrhea, an underactive thyroid gland, trauma, foreign objects (such as plant seeds) and tumors also cause ear inflammation.
Most cases of middle ear and inner ear inflammation are caused by bacteria that pass through a ruptured eardrum. One cause of a ruptured eardrum is overzealous cleaning of the ear canal. Throat infections may also cause middle ear inflammations.