The determination of kidney disease (renal dysfunction or kidney failure) has become so prevalent in cats today. Kidney disease usually does not have obvious symptoms in the early stages without testing. And this is precisely why most cases of cat kidney disease detected only when the condition has become severe. Although a cat has necrotic or damaged kidneys, it can maintain a nearly healthy life for a few years. If the kidney tissue is impaired, but there is still some normal kidney function, the cat can even live well. Therefore, it is often difficult to recognize the weakened condition of the cat’s kidney immediately. Usually, we only recognize cats with kidney failure when about 70% of healthy kidney tissue has been destroyed.

The cause of the disease

The causes of kidney disease in cats are diverse.

It can be  

  • Bacterial infection,
  • Acute and chronic dehydration,
  • Urinary infection.
  • Exposure to poisons,
  • Acute poisoning,
  • High blood pressure,
  • Poor quality protein to older cats (they must be fed with high quality  protein having good digestibility)
  • Immune system disorders,
  • Potassium deficiency.

 Any of the above can cause kidney tissue inflammation and lead to a loss of normal kidney function.

What are symptoms of renal dysfunction?

  • Sudden increases in water intake
  • Frequent urination
  • Vomiting
  • Loss of appetite
  • Weight loss are common symptoms of kidney disease in cats.

How to check your cat’s kidneys working properly?

  • Blood and urine samples produce a certain amount of foreign matter (visible to the naked eye, especially urine), which indicates that the kidneys are unable to filter out toxins from waste products in blood.
  • Whether or not a cat’s kidney function regulates is often determined by the level of other blood components like potassium, calcium, phosphorus, glucose, protein, and albumin.
  • Only a sufficient amount of blood for testing will help us detect inflammation and infection. The urine test will provide more information about the degree of impairment of kidney function, as well as the sedimentation of urine in cats and the occurrence of urinary tract infections.

What you need to consider if your cat has got kidney problem?

  • Test results will distinguish between renal dysfunction and renal failure. Renal dysfunction does not necessarily mean kidney failure, but it may be a decrease in kidney function.
  • If only one kidney is sick (due to an infection, accident, or congenital disability), and the other kidney is healthy, it will still function normally. Normal kidney dysfunction in cats does not require dietary changes or medication. However, doctors recommend that cats with kidney dysfunction have a check-up closely to avoid more severe conditions (such as kidney failure).
  • Kidney disease is hard to cure. So, you should control the progression of the disease instead of treating it thoroughly. The cure rate for late detection is 1%. So prevention is better than cure. If your cat is being diagnosed with a health problem related to kidney disease, pay close attention. Because if not promptly detected and treated, the consequences are unpredictable.
  • It is important to keep sick cats away from harmful substances, including most flea treatments. You can monitor the effectiveness of therapies for treating kidney disease in cats by testing blood and urine in cats. Besides, testing for blood nitrogen, phosphorus, and potassium levels is also helpful for preventing disease progression or even improving the condition. And if you want to know more about cat-related articles, please click here for more information.


  • To help your cat avoid kidney problems, one of the methods that you need to pay special attention to is adjusting your cat’s diet. Specifically, you should reduce the amount of protein and phosphorus in his meals.
  • And according to the researchers, the best way to reduce the amount of protein in meat in a cat’s diet is to reduce the amount of meat he consumes. Instead, include non-meat and protein-based ingredients, but be sure to provide enough nutrition for your cat. And if you do so, it will not be effective because their bodies still need to consume the necessary amount of protein.
    Diet that reduces protein (in foods such as eggs, meat), phosphorus (found in legumes, chicken, fish), sodium (such as seafood, cereals cup) will significantly reduce the symptoms of kidney disease in cats and may also protect the remaining healthy kidney tissue.
  • A treatment that helps balance the amount of water can also help prevent severe complications of the disease. Cats with acute kidney disease will experience nausea, loss of appetite, and frequent vomiting. However, the owner should encourage the cat to eat regularly to prevent energy reserves in his tissues, muscles, fat layer for activities when energy consumption is needed. This means you can bribe the cat to eat anything more than he doesn’t eat anything.
  • Similarly, you also need to help your cat get the water she needs, avoiding dehydration. Because most cats do not like to drink plain water, it is best to feed him wet foods and avoid dry products. You can also add more broth to your cat food or drizzle it with less salty gravy.

Kidney-Friendly Foods

Must contain

  • High caloric density
  • High quality protein
  • Low phosphorus level
  • Low sodium level
  • Extra vitamin B
  • Good hydration level

The drug is not the only treatment for chronic kidney disease. Besides, food is also an essential factor in preventing and fighting kidney disease in cats. I am explaining the readers’ question that every pet food company produces a kidney-friendly diet. Your cat’s kidneys will not have to work hard to excrete the waste of protein metabolism because they contain less than the average protein content of a healthy cat. A diet for kidney cats should also be low in phosphorus and supplemented with B vitamins and potassium. For cats with kidney disease, an increase in phosphorus puts their lives at risk. Therefore, the prescription diet contains omega-3 fatty acids and antioxidants supplements, along with vitamins and minerals, which make it easier to manage kidney disease.

The following is a recipe for food to help your cat reduce protein and phosphorus.

This recipe includes “Mixed Meats,” added with “Mixed Vegetables” in which fats and carbohydrates are added to reduce the amount of meat in the cat’s diet. The amount of food you feed your cat will stay the same, but with this recipe, you will create more cat food with the same amount of meat. In the diet of cats with kidneys, the meat content should be reduced. Instead, you should include ingredients made from fat or carbohydrates.

Combinations that make kidney- friendly food

First recipe

  • Brewer rice
  • Egg products
  • Water
  • Liver and
  • Chicken

2nd recipe

  • Beef,
  • Poultry by products,
  • Rice,
  • Water
  • Meat by products

3rd recipe

  • Corn
  • Chicken
  • Corn gluten meal
  •  Chicken Fat

All these combinations are available in market to be purchased as kidney friendly food for cats

These combinations

  • Support good muscle mass
  • Provides omega fatty acids
  • Reduces inflammation
  • Source of high quality protein
  • Provides good hydration, adequate protein, sodium, and potassium level to cat.

Don’t use pumpkin for senior cats

Canned pumpkin should be avoided for senior pets having kidney disease as it contains high level of phosphorus and potassium.


  • So, what are the best calcium supplements for cats with kidney disease? As recommended in these formulas, you should use Calcium Carbonate and not any other type of calcium. Calcium Carbonate helps block phosphorus molecules.

Vitamins and minerals

  • Many readers often ask me about vitamin supplements for cats with kidney disease. Large amounts of urine result from cats suffering from chronic kidney disease. They also excrete large amounts of water-soluble vitamins, such as B vitamins and potassium. This prescription diet makes supplementing with B vitamins and maintains adequate levels of these essential nutrients.
  • Cats suffering from chronic kidney disease often have low potassium levels, several commercially available potassium supplements that are formulated to attract the most demanding cats.
  • Cats suffering from chronic kidney disease often lack iron and minerals. Iron deficiency usually causes bleeding ulcers or may not get enough iron in the diet if they are not appetizing.

Omega-3 fatty acids and antioxidants

  • The progression of chronic kidney disease depends on inflammation and oxidation. In dogs, omega-3 fatty acids are often added to the kidney-friendly diet by supplementing with fish oil. It has a beneficial anti-inflammatory effect in chronic kidney disease.
  • Have you ever wondered about omega 3 fatty acid supplements for cats with kidney disease? In contrast, for cats, the impact of omega-3 fatty acids on chronic kidney disease is unclear. Typical natural antioxidants include Vitamin C, Vitamin E, and rosemary added to kidney-friendly pet food. Omega-3 fatty acids and antioxidants are also added separately from the kidney-beneficial diet.

Phosphate binder

Typically, elevated phosphorus levels are not associated with a reduction in phosphorus in the diet. To make phosphorus in the gut, you can go to the vet and ask them to prescribe a binder for cats. Phosphate binders should be used at every meal.

Fluid supplements

When a cat has chronic kidneys, the kidneys cannot regulate the water balance in the cat’s body. As a result, cats can sense their dehydration. Veterinarians can ensure optimal treatment of this disease by supplementing with additional nutrients, including vitamins and minerals.

Best Supplements For Cats With Kidney Disease

1. NHV Kidney Disorders Gold Support Kit for Cats, Dogs and Small Pets

The Immune Boost system inhibits infection, alleviates pain symptoms, and provides anti-inflammatory properties in cats. Besides, this product also helps maintain healthy kidney function by dissolving, preventing, and removing kidney stones often associated with kidney disease in pets. In addition to improving the quality of kidney filtration, it also supports liver regeneration, helps improve liver function, and detoxifies the liver by removing toxins with Liver Detox. The manufacturer assures that both NHV Thistle and NHV Tripsy are made from all-natural ingredients. Therefore, they are safe and suitable for long-term use.


  • Helps to soothe kidney stones
  • Healthy support for kidney failure
  • Helps maintain healthy kidney function
  • Promotion of urinary tract health
  • Helps alleviate the symptoms of pain
  • Helps inhibit infection
  • All anti-inflammatory naturally
  • Suitable for long-term use


  • Detoxify the liver by removing toxins
  • Improve liver function
  • Supporting liver regeneration
  • Glycerin based and safe for long-term use

2. Pet Azodyl 6-PACK (360 Capsules) By Vetoquinol

Azodyl has been evaluated by veterinarians as a breakthrough in veterinary products to help prevent kidney damage in cats. Providing natural dialysis through the use of beneficial bacteria that support kidney function effectively slows down the accumulation of neurotoxins—a breakthrough bacterial product to reduce azotemia in cats. Azodyl causes beneficial bacteria to metabolize and eliminate diffused neurotoxins into the intestine naturally. Veterinarians recommend it for acute or chronic kidney disease. Moreover, it supports kidney function by providing natural dialysis, slowing the accumulation of neurotoxins in the blood, and preventing further kidney damage.

If your cat refuses to take the capsule, you can stuff the pill into a piece of animal food or favorite food. This will make it easier for the cat to eat it. Azodyl should be stored at the appropriate temperature, preferably in a refrigerator. You should keep this medicine out of the reach of children and pets. You should also give your cat three capsules daily (2 AM pills and 1 PM pill). Remember that capsules should be taken whole and not opened or crushed.

3. Epakitin

Epakitin supplements your cat’s nutrition to help slow the progression of chronic kidney disease. With great taste, sprinkle on dry food or mix with a small amount of canned food, and cats will eat immediately. It is the easiest way to make your cat eat Epakitin without hesitation. 

Besides, the active ingredient of Epakitin includes chitosan. Natural polysaccharides derived from shrimp and crab shells can easily bind to phosphorus. Therefore, your cat may limit the absorption of phosphorus from the gut. Damage caused by cats’ kidney disease can be significantly slowed. The effect Epakitin brings to reduce serum phosphorus, urea, and creatinine levels.

4. WELL & GOOD Urinary Support Cat Chews

WELL & GOOD Urinary is an excellent supplement for kidney cats. Cats with kidney problems may have trouble filtering urine and other urinary problems. It is made from an entirely new formula that helps maintain a healthy urinary tract function in cats. Therefore, you can safely let your cat use it daily beside the main meal. WELL & GOOD Urinary makes cats feel comfortable to swallow them due to their particular taste and high-quality ingredients. It is made of cranberry and Oregon extract, and they are entirely natural.

You should use two chews in a week and repeat like that for three weeks. Note that you should not use this product during pregnancy or lactation, because the manufacturer will not be responsible for any damage. If your cat is affected by the medication’s side effects, stop giving the cat this product and take him to the vet right away.


RECOACTIV is suitable for cats with renal dysfunction. It is formulated from low mineral concentrations (Ca, Ph, Na, Mg), added, and combined with appropriate vitamin complexes and low protein concentrations. That ensures optimal support for impaired renal function and prevents the severe consequences of the lack of appetite and dehydration observed in this disease.

RECOACTIV® Kidney Tonic is well-tolerated, tolerated, and well absorbed due to its liquid administration form. These supplements stimulate the appetite, so the essential nutrients (iron, manganese, zinc, vitamins A, B, D, and E) in foods are significantly increased. It also means preventing the symptoms of deficiency and making an essential contribution to your cat’s care and treatment.

Final Thoughts

Concerned about the health of cats is a problem that should be a top priority when owning a cat, especially cats with kidney disease. As analyzed above, cats with chronic kidney disease often have many causes. And what you need to do is reduce the amount of phosphorus and protein in your cat’s diet. Instead, provide the calcium and vitamins needed to treat kidney disease in cats. In the article above, I introduced one of the best supplements for cats with kidney disease. And if you are interested in cat-related products, please click here for more information. I hope this article is helpful to you.

Wish your cat good health.



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