<http://schema.org/articleBody>
"For a dog to hear, the cells and nerves that transmit sound, as well as the areas of the brain that interpret and respond to sound, must be intact and fully functional.  There are a number of causes of deafness in dogs.  Conduction deafness is caused by diseases that destroy the outer ear canal, rupture the ear drum (tympanum) or interfere with the function of the tiny bones (ossicles) in the middle ear. These include infections of the inner, middle or outer ear (otitis interna, media or externa), cancer or other tumors, wax or other debris blocking the ear canal and other ear canal disorders."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.petwave.com/Dogs/Health/Deafness/Causes.aspx>