New Dog Flu 2024. But veterinarians who study infectious diseases say this may, in fact, not be an outbreak of a singular illness at all. 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.

A mysterious illness that causes fever, cough and lethargy in dogs has now spread to at least 16 states, the louisiana state university school of veterinary. View the number of tests and positive.