Renal Advanced for cats: instructions for use, reviews and analogues of the drug

About nutrition for cats with kidney disease

Kidney failure in cats is the result of pathological processes and leads to a malfunction of the organ and the entire urinary system. With this disease, gradual damage to all organs occurs. Metabolic processes in the body are disrupted.

At the first stage of the disease, the amount of urine excreted decreases. There is a sharp decrease in blood pressure. As the disease develops, urine production ceases completely. The content of nitrogenous metabolites in the blood plasma increases significantly. At the third stage of the development of the disease, urine begins to leave, but it contains only salt and water, and metabolic products settle in the body and over time begin to destroy it.

Timely treatment helps normalize kidney function. Therapy for renal failure is long-term and lasts up to three months.

Kidney failure in cats can be acute or chronic. The first form of the disease is curable and develops intensively. The second occurs slowly and gradually affects the tissue of the kidney organ. This disease is incurable, and cat owners can only partially alleviate the animal’s condition.

Food for cats with renal failure contains minimal amounts of protein. Therefore, when creating a menu, you should limit your meat consumption by 30-50%. It is acceptable to replace meat products with offal, for example, chicken stomachs and hearts. The animal's diet should include yogurt and cottage cheese. To replenish the required calorie content, the menu is filled with cereal porridges and vegetable purees. Your pet can eat plant foods as much as possible.

If you have kidney disease, do not overfeed your cat. In case of renal failure, the menu is drawn up by the doctor, based on the animal’s condition and tests. In some cases, medicated food for cats with renal failure is included in the diet. Dietary food, especially wet food, as well as natural food, can significantly alleviate the animal’s condition. What to choose: natural food or ready-made food - the veterinarian must decide, based on the condition of the animal and the financial capabilities of its owner.

What does the miracle drug “Advance” contain?

The composition of the drug, as they say, is amazing:

Vitamins C, B-6, B-12

It is difficult to overestimate these “friends of the body”.

The cat needs them for:

normal functioning and structure of bone and connective tissues;
participate in the conversion of acids into easily digestible compounds by the body;
prevent the appearance of stones and sand in the genitourinary system;
reduce “bad” cholesterol;
promote the production of transaminases (liver enzyme catalysts for the formation of amino acids);
reduce the excitability of the central nervous system;
increase tissue regeneration;
Being antioxidants (especially vitamin C), they perform the functions of restoring metabolic processes.

Folic acid

Effect on the body of a cat:

processed into coenzyme - ubiquinone, necessary for the functioning of every cell in the body;
stimulates erythropoiesis (the process of hematopoiesis for the formation of red blood cells);
takes an active part in the synthesis of amino and nucleic acids;
promotes the production of purines and pyrimidines;
participates in the exchange of choline and histidine.

Fructooligosaccharides (FOS)

Objectives of the FOS:

stimulation of lacto- and bifidobacterial intestinal microflora;
suppression of pathogenic bacteria and prevention of dysbiosis;
improved absorption of nutrients from the gastrointestinal tract;
prevention of the development of gas formation (flatulence) and the development of putrefactive processes;
normalization of bowel movements;
nutrition of epithelial cells;
removal of metabolic waste and toxins;
increased calcium absorption;
increased blood lipids;
antiallergic effect;
normalization of hormonal balance.

Hesperidin titration 40%

This plant flavonoid from citrus peels helps:

permeability of the walls of blood vessels and their strengthening;
improves the general condition of small and large capillaries;
increases blood permeability;
relaxes the smooth muscles of the bile ducts;
reduces the effects of allergens;
has pronounced antioxidant, anticarcinogenic and anti-inflammatory properties.

Enterococcus faecium SF68 (Enterococcus faecium) 10 billion/g

Gram-positive lactic acid bacteria, naturally part of the intestinal microflora and digestive tract of cats and other mammals, including humans. The absence or sharp decrease of Enterococcus faecium can lead to the rapid death of the animal from infections of various etiologies.

Lactobacilli or lactobacilli (Lactobacillus acidophilus)

Another known name is bifidobacteria.

What do they do besides breaking down lactose and preventing the development of lactase deficiency??

stimulate all the protective mechanisms of the cat’s body;
increase the rate of regeneration of mucous membranes;
activate phagocytosis (active absorption of foreign bacteria);
promote the synthesis of lysozyme (antibacterial properties of saliva), interferons (a number of proteins that make cells immune to viruses), cytokines (increased immune responses of the body).

Lespedeza capitata 4% (vitamin P titration in dry extract)

The Lespedeza capitata plant is a nutritious addition to the food of all types of animals, including cats, promoting more complete absorption of food.

DSM13241 – Lactobacillus acidophilus strain (LA-5)

Probiotic culture. Used as a dietary supplement that helps restore gastrointestinal microflora.

Maltodextrin

A thickener-filler that gives a uniform structure to products or medications.

From all of the above, it becomes clear why the Renal food additive is not only useful for a cat, it is necessary not only for treatment, but also for maintaining its body in a healthy state!

List of the best dry cat food

Food for cats with kidney failure is produced by many well-known manufacturers. It can be either dry or wet. Do not forget that when eating dry food, the cat must drink a lot of water. Therapeutic food for cats with kidney failure has a positive effect on the animal’s condition. The best are considered:

Eukanuba Renal. Food can be dry or wet. Balanced. Contains essential vitamins and microelements, as well as a small amount of protein and a low concentration of phosphorus. Can be taken for up to six months. One package of wet food 85 g costs about 50 rubles, a package of 2 kg costs 1 thousand rubles, 12 kg costs 5 thousand rubles. Made in the Netherlands.
Royal Canin Renal. Designed specifically to support kidney function. This is a product with a small amount of phosphorus, fatty acids, and antioxidants. The fish oil content here is normalized, which helps to increase glomerular filtration, and the amount of protein is kept to a minimum. The price of 4 kg is 2.5 thousand rubles, 2 kg is 1.5 thousand rubles, and 0.5 kg is 500 rubles. The food is made in France.
Hills Prescription Diet K/D Feline Renal Health. Improves the pet's quality of life. Prevents the progression of the disease. Contains Omega-3. Neutralizes the negative effects of free radicals. It has an excellent taste and is liked by animals. The cost of 1.5 kg of feed is 1,500 rubles, 400 g is about 350 rubles. Made in the USA.
Farmina Vet Life Renal. The food contains about 26% crude protein, which meets all standards for medicinal feed. Contains carbohydrates and fatty acids. Easy to digest. After 3-4 weeks of its use, pets feel significantly better. Price: 2 kg - 1500 rubles, 5 kg -3500 rubles, 0.4 kg - 400 rubles. Factories producing these feeds are located in Italy, Serbia and Brazil.
Monge Grain Free Vetsolution Renal Feline. The food does not contain grains. It is based on freeze-dried chicken. Contains up to 24% protein. They are recommended for cats not only for diseases of the renal system, but also for exhaustion, anorexia and metabolic acidosis. Sold only in veterinary institutions. Packaged in 0.4 and 1.5 kg. The price of 400 g is 350 rubles, 1.5 kg is 1100 rubles. Made in Italy.
Purina Veterinary Diets NF. The food has excellent taste. All cats eat it without exception. The composition includes rice, corn and wheat flour. There are animal fats, minerals and powdered eggs. The protein content reaches 26%. The cost of 350 g is 300 rubles, 850 g is 650 rubles, 1.5 kg is 1000 rubles. Product made in France.

The composition of medicinal feeds is carefully developed. For their production, only fresh, first-class raw materials are used. And the effectiveness of the products has been confirmed by the World Association of Veterinarians.

Recommended daily diet and duration of use

Renal cat food is prescribed by a veterinarian, who also selects the appropriate dosage. Doctors recommend including both dry and wet food in the diet.

Royal Canin for cats and kittens: review of the entire line

The serving size is determined, according to the instructions, based on the physical shape of the pet.

First of all, it is determined whether the pet is overweight or underweight.
If you are underweight, the portion size will be larger than if you are normal.
If there is an excess, give the cat a smaller portion.

For a cat with normal weight, the amount of food is calculated as follows:

with a weight of up to 2.5 kg, a serving consists of 32 g dry or 120 g wet;
with a weight of 2.5 to 5 kg, the amount of dry food can reach 60 g, and wet food - 200 g;
if the cat weighs more than 5 kg, then the volume of dry food reaches a maximum of 100 g (with a weight of 10 kg) and 300 g of wet food (with a weight of 10 kg).

Important! If your cat is underweight or overweight, it is recommended to consult a veterinarian before use. It will help you choose the optimal portion of food in each specific case.

It is recommended to use different types in the diet

The daily dosage, if necessary, is divided into several meals.

A therapeutic diet will give results if it is followed for at least six months. After this, it is recommended to conduct an additional examination of the animal. Based on the results, the therapeutic diet ends or is extended for the required time.

Note! If your pet has serious problems with the kidneys, it is possible that the use of such food will be needed for the rest of its life. In such a case, a suitable diet is selected individually for each animal.

Doctors recommend variety in a cat's diet. Wet food from the Renal line comes in different flavors; you can add a dry product to your diet. It is necessary to ensure that your furry pet always has clean water, especially if there is only dry food in the bowl.

Royal Canin Renal RF cat food

Royal Canin food for cats with kidney failure is often recommended by veterinarians. The main indication for switching a cat to this food is chronic renal failure. In addition, nutrition from the Renal line helps prevent the formation of kidney stones and relapses of diseases such as cystitis and urate.

During treatment, the pet should be on this food for about 6 months. If after this the laboratory tests do not return to normal, then the food is prescribed to the pet for life.

The food has excellent taste and a special particle structure, croquette, which makes it possible to chew them without difficulty. Cat food is enriched with antioxidants. They neutralize the negative effects of free radicals.

This food should not be given to animals during pregnancy, when feeding kittens with milk, or to animals at a young age.

Renal food for cats with renal failure contains a minimum phosphorus content. Its contents include flavones, which have a positive effect on blood circulation and oxidative processes. The food contains Omega 3 fatty acids. They support normal glomerular filtration in the kidney organ.

Among the main ingredients of the food:

corn flour;
rice;
animal fats;
vegetable fiber;
gluten;
fish fat;
soy protein isolate;
calcium carbonate;
mineral elements,
beet pulp.

Nutritional value of the product:

carbohydrates – 37%;
proteins - 23%;
fats - 17%;
fiber - 10%.

Renal food for cats with kidney failure has confirmed its effectiveness. Many reviews say that this food restored the health of their pets, and extended the lives of some.

Analogues of Renal Advanced

IPAKITINE - made in France.

It is used as a therapeutic and prophylactic agent for CKD.

Not effective as an anti-infective agent!

The medicinal composition is almost identical to the composition of Renal.

Additional components: lactose, chitosan, calcium carbonate.

The course of treatment is from 4 to 6 months.

Renalvet (RENALVET) - produced by Vet Planet Ltd, Poland.

Capsules are used as a therapeutic and prophylactic agent for CKD.

Additional components: calcium carbonate, chitosan, vitamin D3.

ChitoFos – made in Poland.

Tablets are used as a prophylactic agent for CKD - the therapeutic effect is weak.

Additional components:

chitosan, protein, brewer's yeast, raw ash, calcium, phosphorus, sodium, calcium carbonate.

Pronefra (PRONEFRA) - produced by Virbac France.

The suspension is convenient to use as a therapeutic and prophylactic agent for CKD.

Complete identity of the composition with Renalzin.

In addition to the main medicinal composition - the drug lantarenol (lanthanum carbonate) and vitamin E.

The possibility of use in a pregnant cat (dog) is limited - there is no data on the effect of lantarenol on fetal development!

Renalzin - manufactured by Bayer Germany

At the moment, the release of the drug has been discontinued due to poor taste. After taking the drug, many animals experienced a vomiting reaction.

Bayer Vital GmbH does not lose hope of returning to the veterinary drug market with Renalcin of improved quality.

Frequently asked questions about Renal Advanced for cats.

Hills Prescription Diet K/D Feline Renal Health

What to feed a cat with kidney failure? Many veterinarians recommend using Hills Prescription Diet for this purpose. The main indications for the use of nutrition are temporary or permanent renal failure, as well as struvite urolithiasis.

Food improves the pet’s quality of life. Inhibits the progression of the disease. It contains Omega-3, which stimulates blood flow in the kidneys. Helps the animal's body resist the effects of free radicals. The product is characterized by excellent taste. It is allowed to mix dry food from this line with wet food.

The food reduces protein and urea in the urine. Improves kidney function. The granules consist of rice and corn ground into flour. Animal fatty acids are present here, which increase the activity of the pet. Their presence in the diet has a good effect on the condition of the skin and coat. The prepared food also includes turkey or chicken meat. The food helps malnourished animals increase their body weight. Improves laboratory parameters. The feed has reduced the amount of phosphorus, calcium and magnesium, but increased the sodium content.

Hill's food for cats with kidney failure stabilizes the content of magnesium and phosphorus in the body. Prevents their excretion in urine. Normalizes the acidity of urine. Promotes the dissolution of crystals and struvite uroliths.

Food should not be given to pregnant animals and kittens. Do not use food for diseases of the cardiovascular system and hyperkalemia. Metabolic acidosis prohibits its use.

If your cat is regularly feeding this food, a urine pH test should be done every six months.

Composition and release forms

There are several forms of the supplement. It is produced in the form of powder and paste. The first product is packaged in plastic jars. The package contains 50 g of supplement. The product is sold together with a measuring spoon.

Components of the drug in powder form:

potassium citrate;
chitosan;
calcium carbonate;
maltodextrin.

The paste is packaged in a 15 ml syringe. It is similar in composition to the powder form in that it also contains chitosan, calcium carbonate, potassium citrate and maltodextrin. The remaining components of this supplement form:

vitamin E;
soybean oil;
pork liver and malt extract;
sunflower oil;
glycerol monostearate.

Thanks to these forms of the drug, urine is alkalinized. The calcium they contain cannot crystallize, because... binds to potassium citrate. Against this background, the formation of stones in the animal’s kidneys is prevented.

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Chitosan affects the composition of blood serum. Due to this component, the amount of cholesterol, urea, toxins and creatine is reduced. At the same time, the level of hemoglobin increases. Due to the action of chitosan, intoxication is reduced and the animal’s appetite is normalized.

Calcium carbonate reduces the bioavailability of phosphate contained in the feed. This component binds excess substances.

You can also find Renal Advanced on sale. This product is produced only in powder form. The package contains 40 g of the drug.

The active ingredients in this supplement contain:

fructooligosaccharides;
folic acid;
bioflavonoids;
Enterococcus faecium;
vitamins B and C;
Lactobacillus helveticus;
maltodextrin.

The supplement in Advanced form can be used not only for kidney problems in an animal, but also for the prevention of diseases of the gastrointestinal tract.

The bacteria included in its composition improve digestion and absorb toxins that spread in the intestines. The drug promotes:

synthesis of B vitamins in the body;
increased absorption of iron in the intestines;
decreased synthesis of urea in the liver;
increasing glomerular filtration rate;
protecting the integrity of kidney cells;
reducing oxidative stress.

Purina Veterinary Diets NF

Purina cat food for kidney failure is considered one of the best. All cats eat it with pleasure. The product is indicated for chronic renal failure. Veterinarians recommend it to prevent urates and cystines and reduce the frequency of their occurrence.

The food is not suitable for kittens, pregnant or lactating cats.

Slows the progression of kidney disease. Positively affects the quality of life of pets. Contains potassium citrate, which reduces the likelihood of hypokalemia. Brings urine pH to a neutral position. Rich in B vitamins. They are usually lacking during diuresis. Contains Omega-3 fatty acids. Prevents the formation of stones.

The product is characterized by low phosphate content and high quality protein. It contains rice, corn, soy and wheat flour. The food contains animal fats, egg powder, beet pulp, and pea fiber. Cat food is fortified with vitamins and minerals. The food contains up to 26% protein, about 12% fat, 3% crude fiber, and 4.5% crude ash.

Medicinal feed

Naturally, with kidney failure in cats, the question comes to the fore: how to save the animal? In fact, the answer is not so simple. All treatment and its result will depend on the cause of the disease, its severity and the presence of concomitant diseases, as well as possible complications.

As for the therapeutic scheme, it has two directions:

relief of the underlying disease,
eliminating signs of deficiency.

The owner is required to provide the animal with peace. It is important that the room is warm and well ventilated, which will facilitate the work of the heart, reduce the breakdown of proteins and eliminate vascular spasm.

It is equally important what to feed a cat with kidney failure. The feeding regimen should be dietary, and salts and liquids should be excluded from the diet in the presence of edema.

The complex of all measures should be aimed at stimulating kidney function and eliminating symptoms:

The use of antibiotics is indicated, against which a novocaine perinephric blockade is performed.
To restore diuresis and replenish fluid, droppers with sodium chloride based on glucose are placed.
Glucose has beneficial properties: improves metabolism, relieves intoxication and increases the antitoxic function of the liver, helps normalize heart function, and improves diuresis.
They also eliminate the symptoms of cardiovascular diseases and direct all efforts to restore kidney function.
In particularly severe cases of the disease, it is necessary to resort to peritoneal dialysis.

Drugs that can improve a pet’s condition during the treatment of kidney failure in cats include vitamins, especially A, D and E:

vitamin A - restores capillaries and the functioning of the endocrine glands, increases the body’s resistance, forcing it to work independently,
Vitamin D restores mineral metabolism, which is very important in such conditions,
Vitamin E - increases protein utilization.

Sick pets have a weak appetite and fatigue. While medicinal foods in this category improve appetite. With therapeutic nutrition in animals, after a few weeks, weight gain is observed. The correct composition of food improves the quality of life of a sick cat.

Sometimes it is very difficult to choose the right nutrition on your own. The right diet will meet the needs of a cat with kidney failure.

The most popular in the segment of food for problem cats are Royal Canin and Purina.

Royal Canin

A series for cats with kidney failure improves the condition of a sick pet. It contains corn flour, animal fats, fiber, and soy protein.

The assortment includes dry food with chicken, assorted food, tuna and canned food. Dietary food in this series reduces the load on the kidneys, restores metabolic balance, and is palatable.

Purina

Manufacturers of dietary and therapeutic food for cats Purina are highly appreciated by veterinarians. Even picky cats prefer the products in this series; they fall in love with this taste from the first plate.

The composition contains flour of different types of grain crops, fiber, minerals, egg powder, fatty acids, and vitamins. The composition is optimally balanced for cats with kidney disease, does not harm them, and improves their health.

Eukanuba Veterinary Diets Renal for cats

Dry cat food for kidney failure Eukanuba Renal is one of the best. Includes a complete dietary menu. Designed for an adult cat. Supports the animal with diseases of the kidney organ.

Dietary food for cats with renal failure is contraindicated during the period of animal growth, pregnancy and lactation.

The duration of use of therapeutic food for cats is six months. If necessary, doctors prescribe lifelong nutrition with this food. The product contains:

corn flour;
soy protein isolate;
animal fat;
corn gluten flour;
sugar beet pulp;
freeze-dried chicken or turkey meat;
fish fat;
calcium carbonate.

It is recommended to use the food only as prescribed by a doctor. During application, you should follow the standards and do not overfeed the cat.

Precautions and contraindications

The only contraindication to the use of the drug is hypersensitivity to the components of the supplement. While taking the product, the condition of the animal, which is not intolerant to the ingredients, remains stable. No side effects or deterioration in the health of cats were recorded when treating kidney disease with the supplement. To avoid complications, it is recommended not to exceed the dosage.

When using the powder form of the additive, you cannot pour the product into another container. The drug must be stored in its original container. In this case, the container must be tightly closed.

All forms of the product are stored at a temperature not exceeding +25°C. They should not be exposed to direct sunlight.

Do not use a supplement that has expired. During the treatment period, the animal should have free access to water.

Farmina Vet Life Renal

Farmina Vet Life Renal food for cats with chronic renal failure contains little protein, which prevents nitrogen metabolism, as well as the occurrence and development of hypertension. The diet is characterized by low concentrations of sodium and phosphorus, which inhibits the progression of the disease. The food contains L-carnitine and L-Carnitine, which increase the pet's activity and endurance. Dry food also contains Omega-3. This has a positive effect on glomerular filtration.

Pet food reduces the negative symptoms of kidney failure. Improves the cat's well-being and physical condition.

Farmina Vet Life Renal food should only be used as prescribed by a veterinarian. The recommended therapeutic course is six months. If the pet has temporary renal failure, then the food is used for 2-4 weeks.

Before feeding your pet, you should determine the daily intake based on the weight of the animal. The resulting volume of feed is distributed over several feedings.

The main ingredients of the food are rice, chicken, corn gluten, whole eggs, fish and fish oil, vegetable oil, inulin and calendula extract.

Storage conditions and periods

At home, the drug can only be stored in a dry and clean place with good ventilation. The powder should not be exposed to direct sunlight. You should also take into account the temperature regime: in the room where the jar of Renal Advanced is located, the thermometer should show from 0 to +25 °C.

Make sure that the drug is kept out of the reach of children and animals. Under such conditions, it can be stored for 2 years from the date of manufacture, even after opening. Carefully read the expiration date on the packaging and discard the powder when it expires.

Important! When using Renal Advance powder, pay attention to its purpose. The product is equally suitable for cats and dogs. But the difference between a dog supplement and a cat supplement is a large measuring spoon.

Therefore, even if you strictly follow the instructions, you will not be able to correctly calculate the required dose.

But the difference between a dog supplement and a cat supplement is a large measuring spoon. Therefore, even if you strictly follow the instructions, you will not be able to correctly calculate the required dose.

Food for older cats with kidney disease

Cats, like all living things, age. After 10 years of life, they begin to develop a variety of diseases. These cats move less and sleep more. Therefore, there must be a special approach to feeding such a pet.

Food for aging cats with renal failure should be selected according to the age of the animal. In this case, more vitamins and minerals are required, but fewer calories. If your cat eats dry food, she should drink a lot of water. The ideal ratio is 3/1. The amount of magnesium and phosphorus in ready-made food for old animals is reduced. Ash content is balanced. Such food should be considered holistic or premium. Contain high-quality and safe ingredients.

It is better to choose wet food for aging cats with kidney failure. Dry food can aggravate the problem. Due to the increased carbohydrate content, dehydration and hyperglycemia can occur. Wet food should have a minimum amount of phosphorus, various food additives and potassium. Veterinarians prescribe such food for old cats along with medications for anemia and hypertension.

You should not put an old cat on a low protein diet, as this will hinder the natural reproduction of muscle mass and the pet will begin to lose weight, which will worsen its health.

In the initial stages of the development of renal failure, you need to transfer the old cat to wet food with a normal, rather than reduced, protein content. The animal should be protected from stress as much as possible and ensure a comfortable existence.

Diet for cats with kidney failure

A diet for kidney failure should only be prescribed by a doctor. Making your own menu for this disease is unacceptable. For your reference, below is an approximate daily diet:

Breakfast. A tablespoon of boiled chopped buckwheat or oatmeal without milk, plus minced rabbit or beef - 8 g. Also add a little finely chopped lettuce or a small piece of grated boiled beets.
Dinner. Boiled and pureed vegetables in the amount of 50 g. Add two tablespoons of minced meat and a teaspoon of porridge to them. The combination of porridge and minced meat is the same as for breakfast.
Dinner. Boiled vermicelli (50 g), mashed with a fork. Add minced meat and broth (10 g) in which the minced meat was cooked.
Before bedtime. A dessert spoon of noodles mixed with two spoons of baby meat food or a teaspoon of porridge mixed with the same amount of minced meat.

Once every seven days, the cat is given a little milk and three quail eggs. Twice a week, minced meat can be replaced with liver.

If the cat does not want to eat, then in case of kidney failure, veterinarians recommend force-feeding it from a syringe. It should be remembered that pets with kidney disease should not starve.

Boiled chicken feet, chopped in a blender, are most suitable for syringe feeding. Infrequent introduction of children's cottage cheese "Agusha" or "Tema" and yogurt into the diet is allowed.

The diet for kidney failure is long-term. Due to the intake of a small amount of protein, there is a possibility of developing degeneration of tissues and organs. To prevent this from happening, veterinarians prescribe the drug “Ketosteril” in parallel.

Prevention

Animal lovers are often confused when they discover that their cat has kidney failure. What to do in this situation? You need to treat your pet without wasting a minute and follow all the veterinarian’s recommendations.

But the disease is easier to prevent than to treat. To prevent kidney diseases, Royal Canin, Purina, Hill's, Brit Care, and Bosch Sanabelle have created special foods. Such food is available for sterilized and elderly cats. They are created taking into account the predisposition of such pets to kidney diseases.

But if your cat has problems urinating, blood in the urine, weight loss, or lack of appetite, you should get tested immediately. Start treatment in a timely manner. In such a situation, only medicated feeds are used, which are selected in accordance with the doctor’s recommendations.

The best food for cats with kidney failure is one that treats, helps pets with kidney failure live comfortably and prolongs their life.

Causes

There are acute and chronic renal failure in cats.
The course depends on the cause of origin, as well as the speed of development of symptoms. The whole variety of factors leading to the development of the disease is usually divided into two categories: renal and prerenal. Real reasons:

the action of toxins coming from outside,
allergic effects of certain medications, for example, sulfonamides,
infectious processes affecting the excretory organs.

Prerenal factors are directly related to dehydration of the body and destruction of red blood cells, which, for example, is observed during infection with leptospirosis or blood parasites.