How do xanthine stones form?

Xanthine stones are typically linked to an accumulation of metabolites in the urine, insufficient water intake, or changes in the urinary environment. Your vet will confirm the cause through urinalysis and imaging — a veterinary consultation is recommended for further evaluation.

Does blood in urine require an immediate vet visit?

If there is only a small amount of blood in the urine and your pet seems otherwise normal, you can monitor closely for now. However, if bleeding persists, your pet appears to be in pain, or is unable to urinate, seek veterinary care immediately.

How can I reduce the risk of urinary stone recurrence?

Common approaches include ensuring adequate water intake, adjusting your pet's diet as advised by your vet, and scheduling regular urinalysis and imaging check-ups. Your vet can advise on the best plan for your pet.

What tests will the vet run to confirm stones?

Your vet will typically arrange urinalysis, X-rays, or abdominal ultrasound, sometimes combined with blood chemistry tests to assess kidney function and determine next steps.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Xanthine Urolithiasis in Dogs & Cats: Symptoms, Diagnosis & Treatment [2025]

Xanthine stones are rare urinary stones linked to purine metabolism disorders or medication use, typically requiring surgical removal and dietary management

Take 1 minute to check the symptoms first

Last updated: 2026/01/06

Pethealthmap Editorial Team

Sources: WSAVA, ISFM, National Taiwan University Veterinary Hospital

When to See a Vet

Seek Emergency Care Immediately

•Repeatedly straining to urinate with no urine passing at all
•Persistent vomiting with signs of lethargy or unresponsiveness
•Sudden collapse or rapid, irregular breathing

Schedule a Clinic Visit Soon (within 24–72 hours)

•Blood in urine or a significant change in urine color
•Visible pain or crying out while urinating
•Frequent trips to the litter box but producing only small amounts of urine

01What Symptoms Indicate a Problem?

Xanthine stones commonly cause lower urinary tract signs. Watch for changes in urination frequency, urine colour, and any unusual urination behaviour.

Blood in urine or visible haematuria
Signs of pain or crying out during urination
Frequent trips to the litter box or toilet area with little urine produced
Straining to urinate with little or no urine passed

Seek emergency care immediately if you notice the following symptoms:

⚠️ Unable to urinate or straining repeatedly with no urine output
⚠️ Persistent vomiting with lethargy or unresponsiveness
⚠️ Sudden collapse or rapid, laboured breathing

02How Can You Assess the Situation at Home? Key Observations and Emergency Criteria

Keeping notes at home helps your vet assess the condition quickly. Monitor changes in urine colour, urination frequency, water intake, and alertness.

Record when blood in urine or abnormal urination first appeared and how it has changed
Estimate and note daily water intake — whether it has increased or decreased
Keep a rough log of urination frequency and volume each day
Take photos or videos of the urine or urination process on your phone
Weigh your pet weekly and track any changes for the vet's reference
If acute symptoms occur (such as inability to urinate), seek veterinary care immediately

03How Does the Vet Make a Diagnosis? Common Diagnostic Tests

At the clinic, your vet will use physical examination, imaging, and laboratory tests to locate the stones and assess kidney and bladder function.

Physical examination

abdominal palpation and assessment for pain response

X-ray

to identify the location, number, and size of stones

Abdominal ultrasound

to evaluate stones in the bladder and kidneys and assess for complications

CT scan

advanced imaging for complex cases or when stone location is unclear

Urinalysis

urine sediment, specific gravity, bacterial culture, and other tests

Blood chemistry and electrolyte panel

to evaluate kidney function and overall health

04What Are the Treatment and Care Options After Diagnosis? Medications, Diet, and Home Care

Treatment includes dietary adjustment, medical management, and interventional procedures when necessary, along with regular imaging and urinalysis follow-up to monitor stone changes.

Adjust diet as recommended by your vet to modify urine composition and reduce stone risk
Medication or other non-surgical management will be determined by your vet after assessment
Urinary obstruction may require emergency intervention and hospitalisation
Regular follow-up with X-rays, ultrasound, and urinalysis to monitor stone changes
Home care involves monitoring urine output, alertness, and appetite, and reporting changes to your vet

05What Should You Prepare Before the Vet Visit? Key Information to Help Your Vet Diagnose Quickly

Note when symptoms first appeared and how they have changed over time

Bring a record of urination patterns and water intake from the past few days

Bring photos or videos of blood in urine or the urination process if available

List all current medications, supplements, and previous test results

Consider booking a clinic that can perform X-rays and urinalysis to reduce waiting time

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.