Canine influenza (dog flu) symptoms in dogs resemble those in humans. Common signs include coughing, nasal discharge, fever, lethargy, and reduced appetite. Coughing is often the most prominent symptom and can persist. Dogs may display varying reactions to the flu, with some showing no symptoms, others recovering within days, and a few becoming severely ill. Senior dogs and those with underlying health issues are at higher risk. Prompt identification of symptoms is crucial for early care and monitoring. If you suspect your dog has the flu, consult your vet for specific guidance on managing their condition.