Contents
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What is kidney disease?
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Common signs and symptoms
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Acute vs chronic kidney disease
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Causes and risk factors
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Diagnosis and stages
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Treatment and support
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The role of diet
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Helpful extras
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Free expert advice
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General information about raw feeding
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Top 5 Takeouts
What is kidney disease?
Kidney disease, also known as renal disease, affects a cat’s ability to filter waste from the bloodstream and regulate hydration and electrolytes. It is one of the most common health conditions in older cats, and in its chronic form, can be managed but not cured.
Common signs and symptoms
Watch for:
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Increased thirst and urination
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Weight loss and poor appetite
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Vomiting or nausea
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Lethargy
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Poor coat quality
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Bad breath or mouth ulcers
These signs often appear gradually, especially in chronic cases.
Acute vs chronic kidney disease
Acute kidney disease develops suddenly and may be triggered by infections, toxins or dehydration. If caught early, it can often be reversed.
Chronic kidney disease (CKD) develops over time. It is progressive, often age-related, and typically affects cats over 7 years old. Once present, it requires lifelong management.
Causes and risk factors
Kidney disease can result from:
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Age-related wear and tear
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High blood pressure
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Dental disease
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Infections
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Certain medications or toxins (e.g. lilies, antifreeze)
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Genetic factors (notably in Persian and Siamese breeds)
Diagnosis and stages
Your vet will use a combination of:
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Blood tests (checking creatinine and SDMA)
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Urine tests (assessing concentration and protein levels)
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Blood pressure measurement
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Imaging (e.g. ultrasound)
CKD is typically classified into stages 1–4, with 1 being the mildest and 4 the most advanced.
Treatment and support
There is no cure for CKD, but many cats live comfortably for years with the right support. Treatment includes:
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Hydration support (subcutaneous fluids or increased water intake)
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Anti-nausea or anti-acid medication
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Phosphate binders to reduce phosphorus levels
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Supplements for potassium or B-vitamins
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Blood pressure medication if needed
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Regular monitoring and vet checkups
The role of diet
A supportive diet is key. Goals include:
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Lower phosphorus
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Moderate protein
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High moisture
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Low sodium
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Excellent palatability
Raw feeding can support kidney health by supplying natural hydration, quality protein and fewer artificial additives.
Avoid high-phosphorus meats (like liver) and opt for lean proteins such as chicken, turkey or white fish.
Helpful extras
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Water fountains encourage drinking
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Probiotics may improve gut health and reduce toxin load
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Omega-3s (e.g. from fish oil) may reduce kidney inflammation
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Herbal remedies such as Rehmannia (under professional advice)
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Avoid vaccinations or medications that stress the kidneys unless necessary
Free expert advice
Our Health Team is happy to help you develop a practical, natural plan to support your cat’s kidneys. We offer free guidance on food, supplements and lifestyle.
General information about raw feeding
Cats are obligate carnivores and thrive on a raw, species-appropriate diet. Benefits may include:
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Healthier weight and coat
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Improved hydration and digestion
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Reduced plaque and tartar
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Stronger immunity
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Better energy levels and mobility
Our complete and balanced raw meals use natural, fresh ingredients your cat would choose in the wild.
