The cause of blood in dog stools needs to be clarified first. It is usually caused by gastrointestinal disease or viral infection, so you need to go to the hospital for examination first to confirm the cause before treatment. First, the dog should be deprived of water and food, and then fed with some probiotics to help regulate the gastrointestinal tract. If the blood in the stool is severe, you need to go to the hospital for a hemostatic injection. Pay attention to your dog's diet and try not to feed your dog sharp, hard and irritating food.