Penis Bleeding
Yes, it can happen. The penis is very vascular and if she pulls away it can really twist and damage his penile sheath. So, with obvious bleeding present, there is no question, he really needs to get appropriate pain medication, anti-inflammatory treatment, and an examination of the penis to ensure no severe trauma and isolate where the bleeding is coming from.
Needs to go to a vet.
When a dog is spotting blood from his penis, there
is generally a standard set of diagnostic tests that are performed. First, we
perform a urinalysis and urine culture, which helps to tell if there is a
urinary tract infection. If there is no infection, then we usually take an
X-ray to help evaluate the prostate and also to look for bladder stones. If the
X-ray is normal, we do an ultrasound to further assess the kidneys, bladder and
prostate gland for signs of cysts or tumors. Occasionally if we still do not
find anything abnormal, we check the dog’s blood pressure and blood clotting
ability to look for more uncommon causes of urinary tract bleeding. However, I
would guess that the most likely source of the bleeding is your dog’s prostate
gland. This gland, which sits just behind the bladder in male dogs, is a common
source for urinary tract bleeding in unneutered male dogs. As the dog ages, the
prostate gland enlarges and can develop cysts or even tumors that can bleed.
Usually, neutering the dog is the solution to the problem. By neutering the dog
you remove the source of testosterone, which will then allow the prostate gland
to shrink. This will usually stop bleeding coming from the prostate gland.