Pet Health

Struvite Crystals in Cats

Learn about struvite crystals in cats, their causes, symptoms, and treatment options. Keep your feline friend healthy with essential tips and prevention strategies!
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
Close-up of a cat's urinary crystals under a microscope, highlighting the formation of struvite crystals in feline urine.

Video Call an Aussie Vet now for just $49 AUD

Dial A Vet is available in Australia, NZ, Canada, United States & Canada!
Speak to A Vet Now

If you’ve noticed your cat is having trouble urinating, or your vet has mentioned “struvite crystals,” you’re not alone. Struvite crystals are a common issue in cats and can lead to urinary discomfort or more serious problems like blockages. As a pet parent, understanding what they are, why they occur, and how to address them can help keep your furry friend healthy and comfortable.

⚠️ What to Watch For

Struvite crystals form in a cat’s urinary tract and can sometimes clump together into stones. While small crystals may not always cause symptoms, larger formations or irritation in the bladder can lead to noticeable signs. Keep an eye out for these symptoms:

  • Frequent trips to the litter box with little to no urine produced
  • Straining or showing signs of pain while urinating
  • Blood in the urine
  • Urinating outside the litter box
  • Excessive licking of the genital area
  • Reduced appetite or lethargy

If your cat displays any of these symptoms, it’s important to take action quickly. A urinary blockage, especially in male cats, can become life-threatening within hours.

🔍 Possible Causes

Struvite crystals develop when certain minerals, such as magnesium, ammonium, and phosphate, combine in urine. This typically happens in urine that is too alkaline (high pH). There are several factors that can contribute to the formation of these crystals:

  • Inadequate water intake, leading to concentrated urine
  • A diet high in magnesium or other minerals
  • Chronic urinary tract infections
  • Stress, which can alter urinary habits and bladder health
  • Genetic predisposition in certain cats

While any cat can develop struvite crystals, they are more common in indoor cats, overweight cats, and those on a dry food-only diet.

✅ What You Can Do at Home

There are steps you can take to help manage or reduce the risk of struvite crystals in your cat. These strategies focus on promoting hydration, improving diet, and maintaining overall urinary health:

  • Encourage water consumption: Cats are notoriously poor drinkers, so try using a cat water fountain, offering fresh water frequently, or adding water to their food.
  • Switch to a wet diet: Canned or wet cat food provides additional moisture, which can dilute your cat’s urine and reduce the risk of crystal formation.
  • Provide a balanced diet: Consult your vet about urinary-specific diets that are formulated to maintain an optimal urine pH and reduce mineral content.
  • Reduce stress: Stress can impact bladder health, so ensure your cat has a calm environment, adequate enrichment, and safe spaces to retreat to.
  • Keep the litter box clean: A dirty litter box may discourage your cat from urinating regularly, increasing the risk of concentrated urine.

These small changes can make a big difference in preventing or managing struvite crystals, but always consult your veterinarian before making major adjustments to your cat’s diet or routine.

💡 When to Call a Vet

While some cases of struvite crystals can be managed at home with dietary and lifestyle changes, others require medical intervention. It’s crucial to contact your vet if you notice:

  • Complete inability to urinate
  • Straining or crying in pain while attempting to urinate
  • Signs of lethargy, vomiting, or a swollen abdomen
  • Persistent blood in the urine

These symptoms may indicate a urinary blockage or severe bladder inflammation, both of which are emergencies. Your vet may need to perform diagnostic tests such as a urinalysis, imaging, or blood work to determine the severity of the issue and recommend appropriate treatment.

Treatment for struvite crystals can vary depending on the case. It may involve prescription diets, medications to dissolve the crystals, or in severe cases, surgery to remove blockages or stones.

FAQs

Q: Can struvite crystals go away on their own?
A: Small struvite crystals can sometimes dissolve with dietary changes and increased water intake. However, larger stones or severe cases require veterinary treatment to prevent complications.

Q: How can I prevent struvite crystals from returning?
A: Prevention involves ensuring your cat stays hydrated, feeding a vet-recommended diet, and addressing any underlying health or behavioral issues. Regular vet check-ups can also help monitor your cat’s urinary health.

Book a $49 online vet consultation at https://www.dialavet.com for fast, expert advice.

References

While every effort is made to ensure the accuracy of this content - including vet review where applicable - this article is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is unwell or you are concerned, please speak with a licensed veterinarian. You can book a $49 online consultation with our veterinary team  😄
Speak to A Vet Now

🐾 You Might Also Like

📈 Popular Pet Topics Right Now