Urinary Incontinence in dogs
- Does your dog leak urine? Have you noticed wet patches on their bedding or fur?
- Urinary incontinence isn’t normal and shouldn’t be ignored, even in an older dog.
- Urinary incontinence can be caused by many different conditions, many of which are curable.
- Contact your vet for an appointment if you have noticed your dog becoming incontinent.
Urinary incontinence explained
Urinary incontinence is not normal and shouldn’t be ignored, even in an older dog. There are many different causes, ranging from congenital problems (something they are born with), to urine infections and spinal problems. Anything that affects the urinary tract, including the muscles and nerves that control it, can lead to incontinence. If your dog has started to leak urine, try not to worry, there are treatments available for many different types of incontinence.
There are many different things that can cause urinary incontinence in dogs. Some are more common in young dogs, male dogs, female dogs and some can affect any age dog, at any time. For this reason, we have split the common causes into age and gender categories.
- USMI. USMI is a common cause of incontinence in female adult dogs, especially large breeds. USMI is when the valve that holds urine inside the bladder becomes weak and leaky. USMI is most common in older females but can also affect young dogs (called ‘congenital USMI’).
- Prostate problems. Prostate problems only affect male dogs (because female dogs don’t have a prostate gland). The urethra (tube that carries urine out of the body) passes through the prostate, so any problems with it can cause incontinence.
- Perineal hernia. A perineal hernia, which is more common in males than females, is a rupture near the anus (bottom). Sometimes a perineal hernia can cause the bladder to move out of position, which causes incontinence.
- Ectopic ureter. An ectopic ureter is when the tube that takes urine into the bladder connects to the wrong place and causes incontinence. It’s a problem a dog is born with, so is most commonly diagnosed early in life. However, it is also sometimes diagnosed in dogs that have coped with condition for a long time and not shown symptoms until later in life.
- Other Congenital Problems. Ectopic ureter (above) is the most common congenital problem vets see in young dogs. There are several other possible abnormalities, but they are all quite rare.
- Spinal problems. Any problems with nerves in the spine that control the bladder can cause incontinence e.g. conditions such as spinal disc disease or degenerative myelopathy.
- Urine infection. A urine infection can cause temporary incontinence due to swelling and pain.
- Urine blockage. Anything that blocks the passage of urine for a long time e.g. bladder stones, can damage the bladder muscles and cause incontinence.
- Injury to the urinary tract. Injuries can leave scarring which cause incontinence.
- Tumours in the urinary tract. Tumours in the urinary tract are rare, but can cause incontinence.
Other symptoms to look out for
Keep an eye out for any other symptoms that could give your vet clues about the cause of your dog’s incontinence:
Published: November 2019
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Written by vets and vet nurses. This advice is for UK pets only.
Illustrations by Samantha Elmhurst