Canine influenza (known also as dog flu) is a highly contagious respiratory disease in dogs caused by specific Type A influenza viruses known to infect dogs. (web-dvm.net)
Is a very highly contagious respiratory disease among dogs. (texvetpets.org)
Canine Influenza is a highly contagious respiratory disease caused by H3N2 and H3N8 viruses. (petparadiseresort.com)