When something happens to stem the flow of a cat’s urine, trouble ensues – and fast.

Urine has lots of good things in it. In many cases, they are substances that cats or people can’t live without, such as potassium, sodium, and water. A body, and most specifically the kidneys, senses and adjusts the composition of bodily fluids and drop the excess into the urine. If a person eats a large order of fries, covered with salt, the kidneys dump the unwanted excess of sodium into the urine. The same is true with many other substances, like water, that need to be regulated. Urine is (usually) sterile, so unless there is a urinary tract infection, urine is pure. It’s not the terrible stuff that many third graders make it out to be. True, it does have the waste products of metabolism in it, which a body needs to remove.

And that’s where some of the problems begin. If the flow of urine stops, those waste products build up and negatively impact the way the body works. One of the most common ways that happens is when a cat’s urethra (the tube that carries urine from the bladder to the litter box) gets blocked. Known in veterinary parlance as a ‘blocked cat’ or ‘blocked tom,’ this poorly understood disorder is seen with alarming frequency in veterinary hospitals and ERs.

Many ERs see about two to three cats per week who cannot urinate. Cats can be in all stages of the disease, from the early onset ones who just seem a little painful and have a big, hard bladder to the nearly dead ones that are in many cases beyond saving.

The actual plug that stops the flow can be made of bladder stones (often erroneously called kidney stones), tumors or a gooey mix of mucus and protein known as ‘matrix’ that has the consistency of toothpaste. How and why matrix forms, no one knows, despite a few decades of investigation. Adding to the confusion, the name of the disorder has changed no less than four times in the past 20 years from feline lower urinary tract disorder (FLUTD) to feline urologic disorder (FUS) to feline interstitial cystitis (FIC) to the most recent iteration of Pandora Syndrome, which hasn’t really caught on yet.

The causes go beyond a mucousy plug, as well. A host of other factors, such as stress, lack of access to water, diet, infectious agents, indoor lifestyle, and many other causes have been implicated as being responsible for the lead-up to getting blocked. Those little plugs don’t form in a vacuum: something causes them to form, and we don’t know with any certainty what factors contribute to it.

Cats that are blocked often show the following signs:

If you notice your cat showing any of the above signs, get right in to see your veterinarian or go to your nearest ER as soon as possible. Don’t delay as a few hours can make a big difference. The longer those toxins circulate unchecked, the more pain the cat experiences, the more work the veterinarian has to do, and the bigger the final bill will be.

In advanced cases, where the urine flow has been stopped for more than 24 hours, cats can become systemically ill from retained toxins and start vomiting, or become very weak and lethargic. Death usually happens within 48 hours, and it’s not a pleasant way to go. The pain with this disease is immense, and some cat owners understandably choose euthanasia over trying to reestablish the flow of urine.

The course after unblocking these cats is just as unpredictable and mysterious as the factors leading up to the obstruction; some cats are released from the hospital never to suffer another episode, while others will have repeated occurrences days, weeks or years later. This is an inhumane disease.

Managing these cases medically can go way beyond relieving the obstruction in some cases. First priority is fixing the plumbing problem: getting urine to flow. This is usually done with anesthesia and a catheter to remove the obstruction. Managing the havoc wreaked by the toxins is next. This can necessitate some medical dancing as veterinarians try to put things back in place.

Disorders of deadly potassium, elevated renal values, and severe dehydration can mean days in the hospital, even long after the urine is flowing again. It can get complex, expensive, and can wear down even the most committed of owners for the really medically complex (and expensive) ones.

One thing that seems to be very helpful in preventing recurrence is increased water intake and lots of it! Some ways to achieve this are with the addition of circulating water fountains as well as transitioning your cat to a canned (or wet food) diet. Additionally, there are prescription diets designed to reduce the formation of the common bladder crystals as well as ensure cats drink more and more water is brought into the bladder.

Urban Animal can help your cat during or crisis. Even better, we can help feline owners prevent one. Call us to schedule an appointment today.


Houston Heights Veterinarian

Urban Animal Veterinary Hospital
1327 Yale St
Houston, TX 77008
(713) 863-0088

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