Teddy can live for about a week without eating and only drinking water. If it does not eat or drink, it can live for about 3 days, and it is also related to the dog's own constitution. If Teddy does not eat, it is best to treat it in time. Send to hospital for examination to avoid life-threatening injuries. If the dog is not sick, he can improve his diet to prevent the dog from anorexia and not eating. If the dog has gastrointestinal disease, he can feed the dog some probiotics or send him to the hospital for an intravenous drip, which can maintain the dog's physical strength.