Skip to Main Content
Ask About Financing

Types of Bladder Stones in Cats & How They Are Treated

Our Poway vets often see cats suffering from uncomfortable symptoms related to bladder stones, but how do they develop and how can they be treated? Today we look at the types, causes, symptoms, and treatments for bladder infection in cats.

What causes bladder stones in cats?

When excessive amounts of certain minerals in your cat's urine clump together with other substances in the bladder, bladder stones can form. Bladder stones can result from a variety of factors, including:

  • Poor diet
  • Dehydration
  • Bladder or urinary tract infection
  • Bladder inflammation caused by crystals
  • Extremes in urine pH levels (too alkaline or acidic)
  • Breed predisposition
  • Congenital liver shunt
  • Medications or supplements

It is believed that overweight male cats may face an increased risk of developing stones. 

Are there different types of bladder stones in cats?

Yes, there are several different types of bladder stones seen in cats, the 2 most common are calcium oxalate and struvite stones.

Calcium Oxalate Stones

Calcium oxalate stones are most common in cats whose urine is extremely acidic. Calcium oxalate stones are also common in cats with high urine and blood calcium levels, as well as cats with chronic kidney disease.

These stones are most often seen in cats that are between  5 and 14 years of age.

Struvite stones

Struvite stones are most common in cats who have highly alkaline urine, which can be caused by a urinary tract infection but isn't always the case. Cats who consume a lot of magnesium, phosphorus, calcium, chloride, and fiber are prone to bladder stones.

A genetic factor may also influence a cat's risk of developing struvite stones since Siamese cats appear to be predisposed to developing struvite stones.

What are the signs of bladder stones and infection in cats?

Symptoms of bladder stones are much the same as the symptoms of a bladder infection in cats, this is due in part to the irritation caused within the bladder due to the stones. If your cat is suffering from bladder stones you may notice one or more of the following symptoms:

  • Frequent urination in small amounts of urine
  • Blood in urine
  • Painful or difficult urination
  • Urinating outside the litter box
  • Straining to urinate without producing urine
  • Abdominal pain
  • Lack of energy

Signs of bladder infection in female cats and male cats are largely the same.

Bladder stones can lead to a urinary obstruction in cats which is considered a medical emergency!  A urinary obstruction occurs when your cat's urethra becomes blocked with a stone and your cat is unable to pass urine. Signs of urinary obstruction include: 

  • Abdominal pain
  • Vomiting
  • Repeated trips to the litter box
  • Yowling or crying while in the litter box
  • Straining to urinate without producing urine

If you notice your cat straining to urinate or any of the other symptoms associated with a urinary obstruction contact your vet immediately or visit your nearest emergency animals hospital for urgent care. 

How are bladder stones in cats treated?

The best treatment for your cat's bladder stones will be determined by the type of stones. A therapeutic diet and medications can often dissolve certain types of bladder stones, including struvite stones.

Calcium oxalate stones cannot be dissolved and are typically treated with cystotomy surgery to open the bladder and remove the stones. This surgery has an excellent success rate and most cats recover from surgery very quickly. 

Can bladder stones be prevented?

It may be possible to prevent your cat from developing bladder stones. If your cat is a breed that faces a higher risk of developing bladder stones you may want to try the following:

  • Feed your cat wet food to help ensure that they are adequately hydrated. Good hydration can help to continually flush crystals out of your cat's bladder and prevent a buildup.
  • Speak to your vet before giving your cat any nutritional supplements, particularly supplements containing calcium, vitamin C, or vitamin D.
  • Ask your vet to recommend a food to help minimize your cat's likelihood of developing crystals that could lead to bladder stones.
  • Ensure that your cat always has easy access to fresh clean water.
  • Make sure that your cat gets plenty of exercises.
  • Keep your cat's litter box clean to encourage your cat to urinate when they need to and not wait.

Note: The advice provided in this post is intended for informational purposes and does not constitute medical advice regarding pets. For an accurate diagnosis of your pet's condition, please make an appointment with your vet.

Contact our Poway vets to schedule an examination if your cat is showing signs of a bladder infection or bladder stones. If you believe that your cat may have a urinary obstruction contact us right away or take your cat to the nearest animal emergency hospital for urgent emergency care.

New Patients Welcome

Best Friends Veterinary Hospital is accepting new patients! Our experienced vets are passionate about the health of Poway companion animals. Get in touch today to book your pet's first appointment.

Contact Us

(858) 679-7387 Contact