Causes of Teddy's diarrhea include indigestion, improper diet, internal parasites, gastrointestinal diseases, viral infections, etc. You need to fast and deprive the dog of water first, then feed some probiotics and observe whether the dog improves; if If there is no improvement, but there are no other abnormal symptoms, the dog can be dewormed internally; if the dog has vomiting, bloody stools, poor energy, loss of appetite, etc., it is best to send it to a pet hospital for examination.