April 2024 Stomach Bug In Dogs. Commonly called the “stomach bug” or “stomach flu,” norovirus is the leading cause of vomiting and diarrhea from acute gastroenteritis, which is inflammation of the stomach and intestines. Most dog stomach bugs will go away on their own in a day or so, but it's.
Worried that your dog might have gastroenteritis? Obstruction occurring near the beginning of the intestines (closest to the stomach) tends to cause more severe and more frequent vomiting.