You can buy pet antipyretic medicine and feed it to your dog. Use a warm towel to wipe the dog's belly, and rub the dog's four meat pads with alcohol to help cool down the dog. During this period, the dog should be placed on a cool floor. Let the dog drink water to speed up the body's metabolism and help reduce the dog's fever. If the high fever persists, the dog needs to be sent to a nearby pet hospital for examination and treatment.