The reason why the dog walks unsteadily, lacks energy, and always likes to lie down may be due to old age, hot weather, calcium deficiency, or physical discomfort. It is necessary to observe whether the dog has other abnormalities. Condition. If the dog does not eat or drink, has vomiting and diarrhea, etc., it is best to take the dog to the pet hospital for examination and treatment; if there are no other abnormalities, it will be fine. You can supplement the dog with nutrients and calcium, and prepare enough for the dog. of water.