🐾 Quick answer: Feline chronic kidney disease affects 1 in 3 cats over 10. Learn the early signs, IRIS staging, and how diet, fluid therapy and medication help manage CKD and give your cat more comfortable years.
Chronic kidney disease (CKD) is one of the most common conditions in older cats — affecting an estimated 30–40% of cats over 10 years old. It’s not curable, but with proper management, many cats with CKD live comfortably for years after diagnosis.
What Is Feline CKD?
The kidneys filter waste products from the blood and regulate fluid balance. In CKD, kidney tissue is gradually lost and replaced with scar tissue, reducing function over time. Because cats have significant kidney reserve, symptoms often don’t appear until 70% of kidney function is already lost.
Signs of Kidney Disease in Cats
- Increased thirst and urination — often the earliest sign
- Weight loss — gradual, progressive
- Reduced appetite or pickiness
- Vomiting — especially in the morning
- Lethargy and reduced activity
- Poor coat condition
- Bad breath — ammonia-like smell (uraemia)
- Mouth ulcers in advanced disease
Diagnosis and Staging
CKD is diagnosed through blood tests (creatinine, urea, SDMA — an early marker) and urine tests. The IRIS staging system (Stages 1–4) guides treatment based on severity. Stage 1–2 cats often feel well and have a good long-term prognosis with management. Stage 3–4 cats need more intensive support.
Management
Diet is the cornerstone of CKD management. Prescription renal diets are phosphorus-restricted and have been shown to significantly slow progression and extend life. Hydration is critical — wet food is strongly preferred over dry food for CKD cats.
Fluid therapy — many owners learn to give subcutaneous fluids at home, which dramatically improves quality of life in moderate to advanced CKD.
Phosphate binders added to food reduce phosphorus absorption from the gut.
Blood pressure management — hypertension is common in CKD cats and damages the kidneys further. Medication is often required.
Regular monitoring — blood and urine tests every 3–6 months track progression and guide treatment adjustments.
- Increased thirst or urination in a middle-aged or older cat — always investigate
- Weight loss or reduced appetite in a senior cat
- Known CKD cat vomiting, refusing food, or seeming significantly worse
- Annual blood tests from age 7 — early detection makes a real difference
Early detection through routine senior blood tests is the most powerful tool we have against CKD. Cats diagnosed early and managed proactively consistently do better than those diagnosed late.
The PawPulse Team
Researched using current veterinary guidelines. Always consult your vet for medical advice about your pet.