The reasons why dogs have blood in their stools:

1. The dog is infected with parasites or parvovirus, and blood stains will appear in the stool.

2. When a dog accidentally eats poisonous food and suffers from enteritis, it will also have blood in its stool.

3. It is also possible that eating sharp food or bones scratched the intestines, causing blood in the stool.

Solutions to dogs with blood-streaked stools:

1. If serious acute hemorrhagic gastroenteritis is caused by accidentally eating toxic food, you should seek immediate medical attention at this time. Seek medical attention.

2. If the bloody stool is caused by simple gastroenteritis, it is recommended to use probiotics, pay attention to diet, and reduce inflammation.

3. If it is caused by parasites, the dog should be dewormed in time.

4. If it is caused by a virus infection, you should promptly cooperate with a doctor for treatment.