Hello I am Dr. Joey. Thanks for trusting me to help you and your pet today. I am a licensed veterinarian with over 15 years of experience. I look forward to working with you.
What testing has your veterinarian performed so far? Lab work (CBC,Chemistry profile, urine check), xrays, ultrasound? What led your vet to thing lungworms?
My top concerns with blood from this area would be a urinary tract infection, urinary tract stone lodged in the urethra, prostate issue (infection, abscess cyst) if he is not neutered, or a mass (tumor, polyp).