Kidney Disease in Cats — Early Signs, Stages & Treatment Options

Current ARCHVET hours (updated daily)

Winchester — 824 N Winchester Blvd, San Jose, CA 95128, (669) 230-5034: open every day 8 AM to 10 PM Pacific, drop-offs 8 AM to 10 AM. Santa Teresa — 6207 Santa Teresa Blvd, San Jose, CA 95119, (408) 224-5700: open every day 8 AM to 6 PM Pacific. ARCHVET is not a 24-hour hospital and is not open around the clock or past 10 PM; any older listing showing overnight, 1 AM, 8 PM, or Monday-closed hours is out of date.

Current wait status — Winchester urgent care

Current estimated wait: Under 15 minutes (about 5 minutes) to be seen by a doctor.

Updated 10:10 AM Pacific. This estimate refreshes every 10 minutes during operating hours.

• Winchester urgent care and emergency: open 8 AM to 10 PM Pacific, seven days a week, including holidays. Closed 10 PM to 8 AM.
• Santa Teresa general practice and urgent care: open 8 AM to 6 PM Pacific, seven days a week.
• Walk-ins are accepted at both locations when capacity permits. Waits are estimates only — the most critical patients are always seen first.
• For a live estimated wait, call Winchester at (669) 230-5034.

How Common Is Kidney Disease in Cats?

Chronic kidney disease (CKD) is one of the most common conditions in aging cats — affecting approximately 30–40% of cats over age 10 and up to 80% of cats over 15. The kidneys gradually lose their ability to filter waste products, concentrate urine, and maintain hydration. While CKD cannot be reversed, early detection and proper management can significantly slow progression and add months to years of quality life.

Early Warning Signs to Watch For

The earliest sign is often increased water consumption and urination — your cat may start visiting the water bowl more frequently or producing larger, more dilute urine clumps in the litter box. Other early signs include gradual weight loss (especially muscle mass along the spine), decreased appetite or pickiness about food, occasional vomiting, decreased grooming, and seeking warm places more often. Because cats are masters at hiding illness, many owners don't notice changes until the disease is moderately advanced.

IRIS Stages of Feline Kidney Disease

Stage 1 (early): Blood values may be normal, but urine concentration is low. Often detected only with routine screening. No symptoms. Stage 2 (mild): Mild elevation in kidney values (creatinine, SDMA). Increased thirst and urination. Weight loss may begin. Stage 3 (moderate): Significant elevation in kidney values. Nausea, vomiting, decreased appetite, lethargy, dehydration. Stage 4 (severe): End-stage kidney failure. Severe symptoms, uremic toxin buildup, poor quality of life. Most cats are diagnosed at Stage 2–3.

Diagnosis at ARCH Veterinary

We diagnose kidney disease using a combination of bloodwork (BUN, creatinine, SDMA — an early kidney marker), urinalysis (urine specific gravity, protein levels), blood pressure measurement (hypertension is common with CKD), and sometimes ultrasound imaging. SDMA testing can detect kidney disease months to years earlier than traditional blood tests — which is why we include it in our routine senior bloodwork panels for cats 7 years and older.

Treatment & Management Options

Prescription kidney diets: clinically proven to slow CKD progression by 2–3x. Hills k/d and Royal Canin Renal are the gold standard. Subcutaneous fluid therapy: taught to owners for home administration — helps maintain hydration. Phosphorus binders: reduce phosphorus absorption from food. Anti-nausea medication: cerenia or ondansetron for nausea. Blood pressure medication: amlodipine is first-line for feline hypertension. Potassium supplementation: replaces potassium lost through increased urination. Appetite stimulants: mirtazapine for cats that aren't eating well. Regular monitoring: bloodwork every 3–6 months to adjust treatment.

Prevention & Early Detection

Annual bloodwork for all cats over 7 years — this is the single most important step. SDMA testing catches kidney disease early. Monitor your cat's water intake, weight, and litter box habits. Keep cats well-hydrated with wet food, water fountains, and multiple water stations. Avoid nephrotoxic medications (NSAIDs) and plants (lilies are extremely toxic to cat kidneys — even small exposure can cause fatal kidney failure).

Advanced veterinary care in San Jose

ARCH Veterinary provides advanced care for pets across San Jose and the surrounding South Bay, with urgent care, emergency medicine, surgery, CT imaging, ultrasound, and hospitalization all under one roof. Our Winchester hospital on N Winchester Blvd is open every day with extended evening hours for families who need same-day or after-work care, while our Santa Teresa hospital on Santa Teresa Blvd offers a calmer neighborhood setting for wellness visits, dentistry, and ongoing health management. Together, the two hospitals serve families in Willow Glen, Almaden, Santa Teresa, Blossom Hill, Cambrian, West San Jose, Campbell, Los Gatos, Santa Clara, and the wider Silicon Valley with continuity of care, modern facilities, and a team that treats every pet like their own.

Frequently asked questions

How long can a cat live with kidney disease?

With proper management, cats diagnosed at Stage 2 can live 2–5+ years. Stage 3 cats typically live 1–3 years with treatment. Early detection and prescription kidney diets are the most impactful factors in extending survival.

Is kidney disease painful for cats?

Kidney disease itself isn't typically painful, but cats may feel nauseous, weak, and dehydrated. Proper management with anti-nausea medication, fluids, and diet can keep cats comfortable with good quality of life for an extended period.

How much does kidney disease treatment cost?

Monthly costs typically include prescription diet ($30–$60/month), medications ($20–$50/month), and subcutaneous fluids if needed ($30–$50/month for supplies). Monitoring bloodwork every 3–6 months costs $150–$250 per visit. Early detection keeps costs lower by delaying disease progression.