The blood in the dog's poop means it has eaten a red substance

If the dog has blood in the poop, consider whether the dog has eaten tomatoes or red substances that cannot be digested. Maybe the dog can't digest it, and the stool is red, so he mistakenly thinks it is blood in the stool.

Blood in a dog’s stool is a sign of parasites

If a dog has blood in the stool frequently or continuously, it may be caused by parasites in the body. Parasites can harm the dog. The dog's gastrointestinal system causes the dog to urinate blood, and the poop is usually jelly-like or contains white worms.

Blood in dog poop is caused by diseases

Diseases such as parvovirus and coronavirus can cause dogs to have diarrhea and then blood. If accompanied by symptoms such as vomiting and lack of energy, the dog should be taken to the hospital for treatment immediately.