Nasal mites (Pneumonyssoides caninum) can cause sneezing, coughing, and head shaking in infested dogs. These uncommon mites are spread directly from dog to dog and are seen more often in large breed dogs. Diagnosis may be made by seeing mites with an endoscope or flushing the nose with saline and examining the fluid.
Treatment: There are no drugs currently approved for treating nasal mites in dogs, but ivermection and milbemycin have been successfully used off-label.