If the dog suffers from gastrointestinal diseases, vomiting and diarrhea will occur at the same time. If it is caused by a viral disease, the dog will also have symptoms of increased body temperature. If it is caused by poisoning, the dog will also suffer from cyanosis of the conjunctiva and foaming at the mouth.
You can take the dog's temperature. If it has a fever and has had cold-like symptoms before, the dog may have canine distemper. Canine distemper is often accompanied by high fever and diarrhea.
In special circumstances, the dog suffers from mental illness, such as the owner is on a business trip and the dog is sent to a strange environment for foster care. The dog does not eat or drink because he misses his owner, and is in poor spirits. The owner should send the dog to the home of a familiar friend and pick the dog back home after the business trip.