A dog that vomits undigested food may be caused by improper diet, gastroenteritis, canine distemper, parvovirus, pancreatitis, etc. It is necessary to observe whether the dog has other symptoms. If the dog is in poor spirits or vomiting For diarrhea, loss of appetite, blood in the stool, etc., it is best to send the dog to the pet hospital for examination and treatment immediately; if the dog does not appear abnormal after vomiting, it can be fed with some probiotics.