Bleeding from the male urethra of dogs is generally caused by urethritis, urethral infection, urethral stones, bladder stones, cystitis, etc. You need to take your dog to the pet hospital to check the specific cause, and then perform surgical treatment to avoid the disease. Aggravated. You should pay attention to the dog's hygiene, bathe the dog regularly, feed the dog lighter food, and let the dog drink more water to promote urination.