New canine flu virus puts nation's dogs at risk

Experts say canine influenza virus is spreading the flu steadily through the nation's dogs, with no vaccine available to curb it.

As many as 5 percent of its victims could be dying.

Researchers recently found that the virus had crossed over from horses to dogs, striking greyhounds at racetracks in 11 states.

Now it has been found in pets, with cases documented in California, Florida, Massachusetts, New Jersey, New York, North Carolina, Ohio, Oregon and Washington.