The dog's twitching and inability to vomit may be caused by gastrointestinal discomfort, improper diet, parvovirus, coronavirus, etc. First, confirm whether the dog has accidentally eaten foreign objects stuck in the throat, and then observe the dog Does the dog have any other abnormalities, such as diarrhea, poor energy, not eating or drinking, blood in the stool, etc. If there are any of these symptoms, send them to the pet hospital for examination and treatment immediately. If not, you can first deprive the dog of food and water. Then feed some probiotics.