Canine Influenza Welfare: Prevention and Treatment

Canine influenza H3N8 and H3N2 strains cause respiratory illness in dogs that spreads rapidly through shelter and boarding populations, demanding vaccination and biosecurity measures.

Key Facts

Two strains of canine influenza circulate in the US: H3N8 (since 2004) and H3N2 (since 2015)
Infected dogs show cough, nasal discharge, fever, and lethargy lasting 10-21 days
Secondary bacterial pneumonia develops in 20-25% of affected dogs and can be fatal
Vaccines against both strains are available and recommended for high-exposure dogs
H3N2 was introduced to the US from Asia and spread rapidly through Chicago shelters in 2015

Welfare Considerations

Dogs with influenza experience the same subjective misery humans feel with flu - fever, body aches, cough, and profound fatigue. Unlike many respiratory pathogens, influenza is airborne, making shelter populations extremely vulnerable once a case enters. Biosecurity failures in boarding and shelter facilities lead to large-scale outbreaks where hundreds of dogs become ill simultaneously. Vaccination is the most effective welfare protection for dogs with regular exposure to other dogs.

What You Can Do

Vaccinate dogs attending boarding, dog parks, and daycare for both influenza strains
Ask boarding facilities about their influenza vaccination requirements and biosecurity protocols
Isolate dogs with respiratory signs immediately from other household pets
Support shelter biosecurity programs through financial donations