I Have A 4 Year Old English Mastiff That Suddenly Started Bleeding From His Penis Area, I Don't Know If It Is From His Penis (being Internal) Or If It Just The Skin In There. Any Ideas Anyone Or Has Anyone Had This Problem That Could Help Me Out?

Bleeding from the penis of dogs can be due to many underlying causes. These cause are common and as well as rare. Some common causes of penile bleeding in dogs are

   1. Infection and inflammation of prostate gland
   2. Enlargement of prostate gland
   3. Tumors in prostate glands
   4. Clotting disorders
   5. Trauma
   6. Urinary tract infection
   7. Kidney or bladder stones
   8. Urogenital cancer

So, take your dog to vet for accurate diagnosis and treatment.