The kidney is one of the high-performance organs in the cat's body. In order to fulfill its various tasks, it must function smoothly at all times. Around a quarter of the blood that leaves the heart with every heartbeat is pumped directly into the kidneys.

What is the function of a cat's kidney?

One of the most important tasks of the kidneys is the elimination of waste products and toxins. A healthy cat produces degradation products and toxins through eating, drinking, exercise and breathing. These can be substances that cannot be processed, but also chemical compounds that are produced during digestion and are of no use to the cat. Medication must also be processed in the body, and once it has done its job, the breakdown products of the medication must be excreted via the kidneys.

A second important function of the kidneys is to regulate the body's water balance. The entire body needs water in order to function. The skin is only healthy and stable if the body contains enough water. The kidneys ensure that there is sufficient water in the body. However, it also excretes excess water so that the body is not burdened by this water.

The mineral balance is also controlled by the kidneys. It regulates the concentration of minerals such as calcium, sodium, potassium and phosphate in the body fluids and also in the body tissue. The kidneys also have a direct influence on bone metabolism through the regulation of minerals. This is regulated by hormones from the kidneys, among other things. Other messenger substances can regulate blood pressure and also influence the formation of red blood cells.

Because the kidneys have so many important functions in the body, it is particularly important to keep them working efficiently. A healthy cat can fulfill all these tasks without any problems and can therefore eat a good and balanced dry food for a lifetime without any problems.

How can I prevent kidney diseases in my cat?

You should make sure your pet has the following basic things to prevent kidney disease:

  • Permanent access to fresh water
  • Several water points
  • Feed with adjusted crude ash or mineral content, for dry feeds below 5.0 % crude ash

One of the most common diseases of the cat's kidneys and urinary tract are crystals or urinary stones. These form when the minerals that form the crystals are present in the bladder for too long and in too high a concentration. Struvite and calcium oxalate stones occur most frequently.

Struvite crystals can be influenced very well by the feed; it is important to choose a feed that lowers the pH value. Struvite stones can even be destroyed with a suitable diet food.

In the case of calcium oxalate stones, feeding can only have a preventative effect. A feed with a low calcium and magnesium content should be selected for this purpose. However, it is not possible to destroy the stones/crystals in the case of calcium oxalate.

Which food is suitable for cats with kidney disease?

Our Sanabelle Urinary has a reduced crude ash content, which is crucial for the pH value.
The feed also has a reduced protein content to reduce the overall metabolic load.

A complete food such as Sanabelle Urinary can be fed to adult cats for a lifetime without any problems and offers good prevention against kidney disease. However, Sanabelle Urinary is not suitable for cats younger than 12 months and therefore still growing.

However, in order to keep the kidneys and urinary tract healthy and efficient, it is not only the right main food that should be taken into account. It is also important to keep an eye on treats and rewards. Especially for cats with pre-existing conditions, treats with a low crude ash content should be chosen.

Do you have further questions about nutrition for kidney disease?

Feel free to contact our nutrition experts. They will be happy to help you by e-mail and by telephone via our free hotline.

Phone: +49 (0) 800 333 8 222 (free of charge)
E-Mail: expertenteam@bosch-tiernahrung.de

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About the author

Dr. Anna Mitura 

Animal Nutrition Physiologist & Product Manager

I am a real Northern Lights and come from Schleswig-Holstein, where I grew up in a small village with dogs. The dog of my heart is called Rufus and is a 13-year-old giant schnauzer mix senior. As a product manager, I develop new recipes for dogs and cats, hold training courses and lectures for customers and dealers and advise you on our free service hotline.