Symptoms can vary, and some cases can be fatal, so it's extremely important to take your dog to the veterinarian as soon as he shows signs of this flu. (bluebuffalo.com)
While the percentage of dogs infected with canine influenza is rarely fatal, it's important to monitor your dog for signs of the flu. (policygenius.com)
But, other common signs of the flu (body aches, loss of appetite, congestion, etc.) could be present. (romper.com)