This section is from the book "Sporting Dogs. Their Points And Management In Health, And Disease", by Frank Townend Barton. Also available from Amazon: Sporting Dogs; Their Points and Management in Health and Disease.
Deafness may be " complete " or only" partial," and confined to one, or affecting both ears.
In some dogs it is congenital, i.e., present from birth; in others acquired.
Severe canker will cause deafness, so will a blow over the ear.
Morbid growths in the passage, and accumulation of waxy material, etc., will likewise produce " partial " or " complete " loss of hearing.
Treatment must be directed to the removal—whenever possible—of the cause.