Yikes. First I’ve heard of this–Dog Flu Spreads Worry Nationwide:
Vets stress that the flu is no reason for pet owners to panic, but they should take some precautions. If you take your dog to a dog park, bring the dog’s own water dish and toys, they say.
Apparently, this is mainly a concern at kennels and race tracks (bah! Race tracks! Shut the evil things down!).