There is a vaccine for the H3N8 strain, one for the H3N2 strain, and a vaccine that covers both strains in one shot. If you live in an area where there has been an outbreak of dog flu, or your pet often comes into close contact with other dogs, it might be a good idea for them to get vaccinated. The vaccine doesnt necessarily prevent the flu, Kellogg says, but will make it less severe. Talk to your veterinarian and see if he or she recommends it. WebMD Pet Health Feature ...