Canine influenza virus causes respiratory illness in dogs, with welfare implications for affected animals and the dog communities where outbreaks occur.
Dogs with severe influenza pneumonia experience significant respiratory distress - labored breathing, oxygen deprivation, and the physical exhaustion of fighting serious lung disease. Even mild influenza causes malaise and discomfort for 2-3 weeks. Hospitalized dogs face additional welfare costs from isolation in unfamiliar environments and medical procedures. Outbreak settings in kennels or daycare facilities create welfare challenges as multiple dogs become simultaneously ill and require separation from social settings they normally enjoy. Prevention through vaccination is highly effective at reducing both individual and population welfare costs.