The prostate gland is responsible for the nourishment of sperms and is present in the pelvic canal. Prostate cancer is uncommon and male dogs are predisposed to this condition. testosterone does not influence prostate cancer because neutered dogs with prostatic enlargement are at higher risk of developing the malignant tumor. Prostate cancer is vigorous and spreads aggressively. Clinical symptoms of prostate cancer include straining to urinate, difficulty in defecation, and defecating more frequently. Diagnosis includes a physical examination by your vet. Abdominal ultrasound and x-rays are most likely to be the next step for a definitive diagnosis. Biopsy of the prostate is the only way to confirm the presence of disease. Treatment options include NSAID medication, chemotherapy, and radiation therapy. Surgical removal of the prostate is not always helpful because of metastasis and the high incidence of complications.