Like many other illnesses, humans are not the only ones susceptible to catching the flu. Learn how to know when your pooch is really feeling under the weather. The holidays are over, but it is still winter and everyone has been exposed to… germs. Ick! Pretty much all the humans know the symptoms of the flu: runny nose, cough, body aches, headache, etc… However, do you know how to spot when your pet pooch has the dog flu?