New Dog Flu 2025. Roughly nine different bacteria and viruses are known to cause respiratory infections in dogs, as outlined in a paper published in november 2013 in the journal. Dogs of any breed, age,.

Canine influenza (flu) is caused by the canine influenza virus. Roughly nine different bacteria and viruses are known to cause respiratory infections in dogs, as outlined in a paper published in november 2013 in the journal.