What to Feed an Older Cat with Kidney Disease: A Complete Guide
As cats age, health issues like chronic kidney disease (CKD) become more common — especially in senior felines over 10 years old. If your older cat has been diagnosed with kidney disease, diet becomes one of the most critical aspects of managing their condition and maintaining their quality of life.
Table of Contents
In this guide, we’ll explain what kidney disease is, how diet plays a role, and what types of food — both commercial and homemade — are best for an older cat with CKD.
🧬 What Is Chronic Kidney Disease in Cats?
Chronic kidney disease occurs when the kidneys gradually lose their ability to filter waste from the blood. The result is a buildup of toxins in the body, which can lead to:
- Dehydration
- Loss of appetite
- Weight loss
- Vomiting or diarrhea
- Lethargy
While CKD is not curable, it can often be managed effectively with diet, hydration, and veterinary care.
🥩 What to Feed an Older Cat with Kidney Disease
The goal of a kidney-friendly diet is to reduce the burden on the kidneys while still providing enough nutrition to keep your cat strong and happy.
✅ 1. Low-Phosphorus Foods
- Phosphorus can speed up kidney damage if levels are too high.
- Look for food labeled “low in phosphorus” (generally < 0.5% on a dry matter basis).
- Avoid high-phosphorus ingredients like bone meal or organ meats.
✅ 2. Moderate to Low Protein
- Too much protein can increase waste products in the blood.
- Use high-quality, digestible proteins like chicken, turkey, or egg whites in moderation.
- Don’t eliminate protein entirely — cats are obligate carnivores and need it to survive.
✅ 3. Increased Moisture
- Dehydration is a serious risk for cats with kidney disease.
- Wet food is essential, or add water/bone broth to meals.
- Water fountains can encourage more drinking.
✅ 4. Low Sodium
- High sodium levels can increase blood pressure and strain the kidneys.
- Choose foods labeled “low sodium” or “sodium restricted.”
✅ 5. Added Omega-3 Fatty Acids
- Omega-3s from fish oil can reduce kidney inflammation and support overall health.
- Ask your vet about safe dosing or find a renal-friendly supplement.
✅ 6. Extra B Vitamins
- CKD cats often lose B vitamins through increased urination.
- Look for renal diets supplemented with B-complex vitamins.
🥫 Recommended Commercial Kidney Diets
These prescription or over-the-counter renal diets are vet-approved and designed for cats with CKD:
- Hill’s Prescription Diet k/d Kidney Care
- Royal Canin Renal Support
- Purina Pro Plan Veterinary Diets NF
- Blue Buffalo Natural Veterinary Diet KS
🛑 Note: Always consult your veterinarian before switching to a prescription diet.
🍳 Homemade Diet Options
If your cat refuses commercial renal diets, a homemade diet may be recommended. Work with a veterinary nutritionist to ensure it’s balanced.
Basic renal-friendly homemade ingredients include:
- Cooked egg whites (low phosphorus, high-quality protein)
- Boiled chicken or turkey (no skin or seasoning)
- White rice or pasta (carbohydrate source)
- Pumpkin or squash (fiber and hydration)
- Fish oil or renal supplements (for omega-3s)
Never feed homemade diets without expert guidance — CKD cats need precise nutrient levels.
🚫 Foods to Avoid
Avoid feeding:
- High-protein raw diets
- Tuna and sardines (high phosphorus)
- Dairy products
- Dog food (nutrient imbalances)
- Garlic, onions, or grapes (toxic to cats)
🩺 Feeding Tips for Cats with Kidney Disease
- Feed small, frequent meals to encourage appetite
- Warm up wet food slightly to enhance aroma
- Use low-phosphorus treats like cooked egg whites or small bits of plain chicken
- Monitor weight and hydration regularly
- Consider appetite stimulants if your cat is eating less
Final Thoughts
Feeding an older cat with kidney disease can feel overwhelming, but the right diet can significantly slow the disease’s progression and improve your cat’s comfort and longevity. Whether you opt for a prescription diet or a carefully planned homemade meal plan, the key is low phosphorus, moderate protein, high moisture, and regular vet checkups.
With the right care and nutrition, many cats with CKD can live happy lives for years after diagnosis.
