The nose, in health, is always moist, and by a discharge we mean one which is clearly perceptible, whether watery or mucopurulent. In the former case there is the perpetual “dew-drop” at the end of the nose, often seen in hard-pad. It should not be confused with the occasional “drip” seen in nervous puppies when handled by strangers.

A nasal discharge is due to a variety of causes which may be summarised as local and general.

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