What causes blood in a dog’s stool?

Blood in a dog’s stool can be caused by different issues, including anal fissures, parasite infection, foreign objects scratching the intestines, and canine parvovirus. First, when a dog is constipated, difficult bowel movements can damage the intestinal lining and cause bleeding, showing blood in the stool. Second, a parasitic infection can also cause bloody stool, which requires prompt deworming.

In addition, viral infection or other diseases can also cause bloody stool. If the symptoms are severe, take the dog to a vet for examination and treatment promptly.