Bladder and Urethral Stones in Dogs
A stone is the most common cause of an obstructed bladder. Tumors and
strictures are less common causes. Enlargement of the prostate gland is a rare
cause of bladder obstruction in male dogs.
A dog with an obstructed bladder is acutely uncomfortable or in dire
distress. Males and females often assume a peculiar splay-legged stance while
attempting to void. A partial blockage can be suspected when the dog dribbles
urine, voids frequently, and has a weak, splattery stream.
A partial obstruction, left untreated, may become a complete obstruction.
With a complete obstruction no urine is passed. The lower abdomen becomes
swollen and tender to pressure, and it feels as if there is a large ball in
front of the pelvis. Note that the continuous straining associated with an
obstructed bladder can be mistaken for constipation.
Treatment:Adog with a partial obstruction due to a urethral stone may pass
the stone spontaneously. Treatment thereafter is similar to that described for
Bladder and Urethral Stones, page 415.
A complete obstruction is an acute emergency. Take your dog at once to the
veterinarian. If the blockage is not relieved, the dog will go into kidney failure or the bladder
could rupture. Often the stone can be pushed back into the bladder using a
sterile catheter, or by infusing water under pressure into the urethra. If not,
surgical removal will be necessary.