Chronic Kidney Disease in Cats

    Chronic kidney disease (CKD) is the most common disease in cats over 10 years old, affecting up to 30% of seniors. Treatment focuses on slowing progression and quality of life.

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    Medically reviewed by

    Анна Петрова, DVM, к.в.н.

    Lead Veterinary Editor

    Last reviewed:

    Chronic Kidney Disease in Cats

    Chronic kidney disease (CKD) is the most common disease in cats over 10 years old, affecting up to 30% of seniors. Treatment focuses on slowing progression and quality of life.

    • Increased thirst and urine output
    • Gradual weight loss
    • Reduced appetite, intermittent vomiting
    • Dull coat, uraemic breath

    Symptoms

    • Increased thirst and urine output
    • Gradual weight loss
    • Reduced appetite, intermittent vomiting
    • Dull coat, uraemic breath
    • Weakness, low activity
    • Constipation from dehydration

    Causes

    • Age-related kidney changes
    • Chronic infections
    • Polycystic kidney disease (Persians, Maine Coons)
    • Hypertension and heart disease
    • Long-term nephrotoxic medications

    Diagnosis

    1. Biochemistry: creatinine, urea, phosphorus
    2. SDMA — early dysfunction marker
    3. Urinalysis with specific gravity
    4. Blood pressure
    5. Renal ultrasound
    6. IRIS staging (1–4)

    Treatment

    • Therapeutic diet — low phosphorus, controlled protein
    • Subcutaneous fluids (weekly or at home)
    • Phosphate binders
    • Hypertension control (amlodipine)
    • Erythropoietin for anaemia
    • Gastric protection (omeprazole) for nausea
    • Monitoring every 3–6 months

    Prevention

    • Senior wellness exams twice a year
    • Blood pressure monitoring
    • Free access to fresh water, fountains
    • Quality food with moderate protein
    • Treat UTIs early to prevent chronicity

    When to see the vet

    • Cat drinking noticeably more
    • Weight loss without dieting
    • Vomiting 1–2 times a week
    • Notable weakness or hiding

    Treatment costs (₽)

    Biochemistry + SDMA₽3,500 – ₽6,500
    Renal ultrasound₽1,500 – ₽3,000
    Therapeutic diet, 12 kg₽8,500 – ₽14,000
    Subcutaneous fluids (visit)₽800 – ₽2,500

    FAQ

    How long does a cat with CKD live?

    Depends on stage: stage 1 — years, stage 4 — weeks to months. Early diagnosis and diet extend life.

    Can I give fluids at home?

    Yes. The vet trains you to administer subcutaneous fluids 2–3 times a week.

    Does diet really help?

    Therapeutic diet is the cornerstone — proven to slow disease progression.