A dog that has not pooped for two days will be prone to danger, so once you find that your dog has not pooped for a long time, you should treat the dog immediately. You can feed the dog some probiotics to promote gastrointestinal digestion, you can also feed the dog yogurt or honey water, prepare liquid food for the dog, and let the dog drink more water. If the dog still does not defecate, you need to send the dog to the pet hospital for treatment. Check for treatment.