Dogs with blood at the end of their stool but very energetic may be caused by improper diet, gastrointestinal bleeding, intestinal parasites, parvovirus, canine distemper, coronavirus and other diseases. It is best to take the dog to the pet hospital for examination. , to avoid delaying treatment. Dogs should be dewormed internally and externally on a regular basis, and vaccinated on time. Pay more attention to their diet. Do not feed your dog raw, cold, sharp or hard food, especially chicken bones and fish bones. Such food can easily scratch the gastrointestinal tract and cause gastrointestinal disease. Gastrointestinal disorders.