The dog died after drinking isatis root. It may be because the dog was poisoned by the drug due to excessive consumption, and the dog died due to lack of timely treatment. It is best not to feed dogs random human medicines, because the ingredients of human medicines may cause some harm to dogs, and the dosage of medicines is also different. Dogs generally need to determine the dosage of medicine based on their weight, so it is best to consult a professional doctor. It is recommended that you give your dog medicine before giving it.