Flu Symptoms 2024 How Long Does It Last In Dogs. According to the american veterinary medical association, about 80 percent of dogs exposed to the virus will get sick with symptoms like a soft, moist cough, nasal. How to test for canine influenza.
How long does dog flu last? Symptoms can last for two to three weeks, and dogs should be fully recovered after that, as long as they donโt develop secondary infections.