It is not normal for dogs to bleed in their urine when they are on their period. During a dog's menstrual period, his or her vagina will bleed, which is a normal physiological phenomenon. However, if your dog is experiencing symptoms of blood in his urine, it could be due to another health issue, such as a urinary tract infection, stones, or other urinary tract disease.

If your dog has blood in its urine during menstruation, it is recommended to take it to the pet hospital for detailed treatment as soon as possible. Examination to determine the specific cause of bleeding and appropriate treatment based on your veterinarian's recommendations. During this period, owners need to pay special attention to the dog's hygiene to avoid infection. They should also pay attention to the amount of bleeding and other symptoms of the dog so that they can report it to the veterinarian in time.