Can Cats Pass Bladder Stones Without Surgery? What Every Cat Owner Should Know

If your cat has been diagnosed with bladder stones, you may feel anxious and unsure about what to do next. Many cat owners naturally wonder: Can cats pass bladder stones without surgery?

The short answer is: sometimes, but it depends on the type, size, and number of stones, as well as your cat’s overall health. Let’s break down how bladder stones form, whether they can pass on their own, and what treatment options you have.

What Are Bladder Stones in Cats?

Bladder stones, which are also known as uroliths or urinary calculi, are tough mineral formations that can develop in a cat’s bladder. They occur when certain minerals in the urine become overly concentrated and start to stick together over time.

There are different types of bladder stones in cats, but the most common are:

• Struvite stones — made of magnesium ammonium phosphate
• Calcium oxalate stones — made of calcium and oxalate minerals

Other, less common types include urate and cystine stones. The type of stone makes a big difference in how they are treated.

Can Cats Pass Bladder Stones Naturally?

In some cases, very small bladder stones might pass through the urethra when your cat urinates. However, this is not common, and it can be dangerous.

Cats have narrow urethras, especially male cats. Even tiny stones can get stuck, causing a painful and life-threatening urinary blockage. If a cat gets blocked and can’t pee, it can quickly lead to serious issues like kidney failure or even a bladder rupture in just a few hours.

For struvite stones, your vet may recommend a special prescription diet that can help dissolve them over time. If the stones are small enough and your cat eats the diet strictly, they may dissolve and pass as crystals in the urine.

However, calcium oxalate stones cannot be dissolved with diet alone. They do not break down naturally and typically require surgical removal or other medical procedures.

Symptoms of Bladder Stones in Cats

Bladder stones can cause discomfort and irritation in the bladder lining. Common signs include:

• Straining to urinate
• Frequent trips to the litter box with little urine produced
• Blood in the urine
• Urinating outside the litter box
• Crying or vocalizing when peeing
• Licking the genital area excessively

If you see any of these signs, get your cat to a vet right away.

Treatment Options for Bladder Stones

Whether or not your cat needs surgery depends on the type and size of the stones:

Dietary Dissolution

For struvite stones, vets often prescribe a special urinary diet that makes the urine more acidic and reduces mineral levels. This can dissolve the stones within weeks to months. It’s important to follow the diet exactly — treats or other foods can prevent it from working.

Non-Surgical Removal (Voiding Urohydropropulsion)

When it comes to small stones, veterinarians sometimes perform a procedure known as voiding urohydropropulsion. In this process, the cat is sedated, the bladder is filled with fluid, and gentle pressure is applied to help flush the stones out. This only works for very small stones and carries some risks.

Surgery (Cystotomy)

If the stones are large, numerous, or not dissolvable, surgery is usually the safest option. The vet makes an incision into the bladder to remove the stones directly. While surgery sounds scary, it’s a common and generally safe procedure when performed by an experienced vet.

Other Procedures:

Some specialty clinics offer non-invasive techniques like laser lithotripsy (breaking stones with a laser). However, these are not widely available and may not be suitable for all stone types.

How to Prevent Bladder Stones in Cats

After treatment, preventing future stones is key. Here’s how you can help:

• Feed a high-quality diet recommended by your vet.
• Ensure your cat always has fresh water to encourage frequent urination.
• Use a water fountain to entice your cat to drink more.
• Keep the litter box clean to encourage healthy bathroom habits.
• Schedule regular check-ups to monitor your cat’s urinary health.
  

When to Call the Vet

Never wait and hope a bladder stone will pass on its own. A blockage can become fatal very quickly, especially in male cats. If your cat shows any signs of urinary distress, get emergency veterinary care immediately.

So, can cats pass bladder stones without a professional service in surgery? In some cases, yes — but only small, dissolvable stones like struvite stones can safely pass with the help of a prescription diet and careful monitoring. Other stones, like calcium oxalate, require surgical removal or other veterinary procedures.

When in doubt, always follow your vet’s advice. With the right treatment plan and preventive care, you can help your cat stay comfortable, healthy, and stone-free in the future.