Which of the following indicates an abnormal ear canal?

An abnormal ear canal can be identified by several signs, one of which is a stenotic appearance accompanied by black debris. A stenotic ear canal refers to one that is narrowed, which often occurs in conditions such as chronic inflammation or infections. The presence of black debris may indicate the presence of ceruminous (earwax) buildup, foreign material, or even an infection, which are all abnormalities that require further examination and possibly treatment.

Observing the ear canal for these features is crucial as they may signify an underlying health issue that could lead to more serious complications if left unaddressed. A healthy ear canal typically does not exhibit these characteristics; therefore, the stenotic appearance and the presence of black debris are clear indicators that warrant concern and further veterinary assessment.