Why Is My Dog’s Nose Running?

Dog nasal discharge comes from irritation of the nasal lining caused by chills, colds, or rhinitis, and its type offers clues: clear watery fluid usually means a chill, while thick or sticky discharge can signal distemper, pneumonia, bronchitis, or sinusitis. For a mild chill, keep your dog warm and hydrated; adjust the diet if it's heat-related. Persistent or accompanied discharge should be checked by a vet.