Continual Kidney Illness (CKD) in cats
Likelihood is, if a cat lives lengthy sufficient, he’ll get kidney illness. 81% of cats over the age of 15 have persistent kidney illness (CKD).[1]
The kidneys are form of the Swiss military knives of all of the physique organs. They carry out quite a lot of life-sustaining chores, and none of us – not cats, dogs, people, nor some other animals who’ve kidneys – can survive with out them.
What do the kidneys do? Why do the kidneys fail? What therapies can be found to cats with persistent kidney illness at this time? I attempt to reply these questions and extra on this publish.
Even in case you are fortunate sufficient to have a cat with wholesome kidneys at this time, it’s nonetheless price studying about this illness. In case your cat is graced with a protracted life, you’ll seemingly face CKD ultimately.
And whilst you can’t utterly eradicate the danger of kidney illness in cats, there are issues you are able to do to cut back her probabilities of getting this illness, or to catch CKD early. Information and early therapy can enhance your cat’s size and high quality of life.
Learn on.
The kidneys are two bean-shaped organs which might be situated close to a cat’s rib cage, one on either side of the backbone.
Contemplating how a lot these organs do, it’s laborious to consider how tiny they’re. Every cat kidney is barely about an inch-and-a-quarter to an inch-and-a-half lengthy.[2]
Kidneys filter a cat’s blood
Some of the essential jobs that kidneys do is clear waste merchandise from the blood and switch them into urine, which will get peed out of the physique.
How does blood get so “soiled” that it wants cleansing?
When a cat eats, his physique takes all of the vitamins from the meals, and turns them into vitality.[3] All of the stuff that’s left over, which is now within the cat’s blood and bowels, is waste. If waste is allowed to construct up within the blood, it may change into poisonous.
Blood is consistently circulating by way of the kidneys. Blood that must be cleaned, enters a kidney by way of the renal artery. It strikes by way of progressively smaller blood vessels till it reaches the nephrons, that are the kidney’s tiny filters.
The waste that’s filtered out by the nephrons turns into urine. Urine drains into a group channel and exits the kidney by way of the ureter, which leads straight to the bladder (and ultimately, the litter box). The newly filtered blood returns again to the physique.
The kidneys filter all of the blood in a cat’s physique many occasions a day. We truly don’t know what number of occasions cats’ blood passes by way of their kidneys, however in people, our whole blood provide passes by way of our kidneys roughly 300 occasions a day.[4]
Kidneys additionally assist maintain a cat’s physique “balanced”
A cat’s kidneys assist preserve homeostasis within the physique. Homeostasis simply means “the established order.” Kidneys assist ensure that physique programs don’t get out of whack.
For instance: kidneys management the stability of water within the physique, so there isn’t an excessive amount of or too little. They management the acidity of the blood, in order that it stays as near impartial as potential.
Kidneys handle blood stress by sending out hormones to manage the contraction of blood vessels. They maintain electrolytes – important minerals that do the whole lot from ensuring the guts capabilities correctly, to holding a cat’s tooth sturdy – in stability.
Kidneys additionally stimulate a cat’s bones to make purple blood cells, and activate Vitamin D in order that it may be utilized by a cat’s physique.[5]
CKD isn’t truly a illness. It’s extra of an outline of what’s going on in a cat’s physique when the kidneys lose their skill to totally operate from another illness, harm, or getting old.[6]
Numerous issues can occur to a cat that in the end impression his kidneys. Cats may be born with kidneys that didn’t kind correctly within the womb, impacting their skill to do their job over a cat’s lifetime.
A single occasion, like a poisoning or a automotive accident, can injure a cat’s kidneys.
An illness can injury the kidneys, too, and inhibit their skill to carry out the way in which they’re speculated to. Even sure medicine prescribed by your veterinarian to deal with or diagnose an sickness have the potential trigger kidney hurt.
Any one in all this stuff can result in the continuing, progressive deterioration within the kidneys that we describe as “persistent kidney illness.”
Listed here are among the widespread issues that may result in CKD in cats:
Congenital ailments
Some cats are born with malformed kidneys. Polycystic kidney illness, an inherited illness which is widespread in longhaired cats, is one instance of a congenital kidney illness.
Amyloidosis, during which irregular proteins are deposited on numerous tissues and organs, together with the kidneys, can be an inherited, congenital illness.
Bacterial infections
A bacterial an infection of the kidneys, often called pyelonephritis, normally begins out as a decrease urinary tract an infection that works its manner as much as the kidneys.[7]
Sure tick-borne bacterial infections, together with Lyme illness, may trigger kidney failure.[8]
Viral infections
Feline viral infections, together with feline infectious peritonitis (FIP), feline immunodeficiency virus (FIV), and feline leukemia virus (FeLV) can injury the kidneys.
Parasite infections
Some parasites are able to invading the kidneys, together with Capillaria plica, also referred to as the kidney worm.
Toxins
Widespread family toxins – antifreeze, lily vegetation, human drugs (particularly antibiotics and over-the-counter painkillers like Tylenol and Advil), and mouse or rat poisons – may cause irreparable injury to the kidneys if consumed by a cat.
Learn all about the dangers of lilies in this post.
Different ailments
Hyperthyroidism, which causes hypertension in cats, can injury the kidneys.
Coronary heart failure with low blood stress may trigger hurt to the kidneys.
Clotting issues, sure cancers, and immune issues can all have an effect on kidney well being.
Harm and sickness
A cat who loses an excessive amount of blood after being hit by automotive, for instance, would undergo low blood stress that would impression the kidneys.
Overheating in sizzling climate, or excessive vomiting and diarrhea, can all trigger a speedy drop in physique fluids that may have an effect on the kidneys.
Why accomplish that many cats appear to finish up with kidney illness?
The quick reply is that scientists and veterinarians don’t know (but). However there are two elements that in all probability contribute:
Cats have fewer nephrons
Cat kidneys are overbuilt. Cats want solely a small share of the nephrons they have been born with to outlive. However, cat kidneys nonetheless don’t have as a lot spare nephron capability as human or canine kidneys.
Cats have about 200,000 nephrons in every kidney, whereas canine have twice that many, and people have 1,000,000 nephrons in every kidney.[9]
In different phrases, different animals simply have extra nephron wiggle room ought to their kidneys change into broken.
Cats don’t drink sufficient water
Continual dehydration could also be a threat issue for kidney illness. The kidneys are hardworking organs they usually want hydration to do their job correctly. Blood valves must be open, waste wants moisture so it may be flushed, and vitamins want to have the ability to circulation simply to the kidneys.[10]
Cats are notoriously fussy water-drinkers. I’ve written a whole post about why cats don’t seem to drink enough, and what you can do about it.
And it would simply appear like cats are notably susceptible to kidney illness versus different animals. It’s estimated that greater than 50% of people over the age of 75 undergo from kidney illness, too.[11] It’s seemingly that simply getting old may cause the kidneys of all creatures to ultimately fail.
Kidney illness is generally an issue for mature and senior cats. Kidney illness impacts 30-40% of cats older than 10, and 81% of cats over 15.
Solely 10% of cats youthful than 3 years outdated can have kidney illness.[12]
Sure cat breeds appear to be extra susceptible to inheritable forms of kidney illness. These cat breeds embrace:
Within the early phases of illness, the kidneys cope with injury by merely producing extra urine. The kidneys lose their skill to filter, so that they compensate by flushing waste out with numerous water. Cats will are inclined to drink extra water to make up for all of the moisture that’s being was pee by the kidneys.
One downside is that the child will get thrown out with the tub water: protein and nutritional vitamins get flushed out, too, together with the waste. The lack of essential vitamins can have an effect on a cat’s urge for food and impression many physique programs.
As soon as two-thirds of the kidneys have failed, there’s a speedy rise in waste within the bloodstream that the kidneys simply can’t sustain with. The kidneys don’t have the flexibility to filter the waste, nor are they capable of merely flush all of it out. That is when cat guardians usually start to note signs of sickness of their cats (see the symptom checklist beneath).
Failing kidneys additionally signifies that blood stress isn’t being correctly regulated. Hypertension can impression a cat’s eyes, mind, and heart.
When kidneys are unable to do their job, acid builds up within the blood, which impacts the operate of a spread organ programs.
Failing kidneys could imply {that a} cat is unable to provide purple blood cells, resulting in anemia, the place there aren’t sufficient purple blood cells to hold oxygen to a cat’s physique tissues.
The early indicators of CKD are sometimes misattributed to “regular getting old.” They embrace:
- Weight reduction
- Poor coat high quality[13]
Because the kidneys proceed to fail, extra signs of CKD embrace:
- Unhealthy breath
- Poor urge for food
- Ingesting extra
- Urinating extra
- Vomiting
- Diarrhea
- Lethargy (drained, missing in vitality)
- Mouth sores
- Cat seems unkempt (scruffy, ungroomed)
- Fever
- Peeing accidents, or an lack of ability to urinate
- Decrease again ache
- Swelling within the limbs[14]
Diagnosing CKD may be very difficult. The “downside” (in quotes, as a result of additionally it is a lifesaving present) is that cats have sufficient spare capability of their kidneys that they’ll lose as much as two-thirds of their kidney operate earlier than it begins to have an effect on their well being. A cat’s kidneys may be quietly failing for months or years earlier than a cat guardian or veterinarian may even discover.
Conventional exams for kidney illness: blood urea nitrogen (BUN) and creatinine, are “late markers” for kidney failure. That signifies that they don’t present {that a} cat is sick till CKD is sort of far alongside.
As we speak, there’s a comparatively newer take a look at that may decide if early kidney illness is going on. A blood take a look at for SDMA (symmetric dimethylarginine), acts like an early warning system that the kidneys aren’t filtering the blood the way in which they need to.[15]
SDMA can detect as little as 25-40% discount in kidney operate, in comparison with 75% lack of kidney operate for the creatinine take a look at, for instance.[16]
The primary concern with this newer take a look at is that there haven’t been any large-scale research in cats on its use. When in a cat’s life ought to veterinarians start providing this take a look at to sufferers? How usually ought to the take a look at be repeated earlier than kidney illness is recognized? What different elements have an effect on SDMA in a cat’s blood? How ought to SDMA take a look at outcomes be analyzed?
And most significantly, we want research to indicate that early intervention improves outcomes for cats with CKD.
We don’t have all of the solutions but.
All exams for kidney illness are searching for larger concentrations of waste and different substances in a cat’s blood and urine that wholesome kidneys can be filtering out. A veterinarian could suggest multiple take a look at to verify the findings of different exams.
Ideally, cat’s blood can be examined a second time, some weeks or months after the primary take a look at (and after fasting), earlier than a vet diagnoses a cat with CKD, as there are lots of strange issues, like dehydration, that may present inaccurate readings.
Blood urea nitrogen (BUN)
This take a look at seems for urea nitrogen, a waste product that’s created when a cat’s physique breaks down the protein that she eats. A better BUN might point out kidney failure.
Creatinine (CREA)
Creatinine is a waste product that comes from digesting protein and from the traditional use of muscle groups. A creatinine take a look at measures how properly the kidneys are filtering waste from the blood. An excessive amount of creatinine suggests kidney injury.
Electrolytes
It’s the kidneys’ job to maintain electrolytes similar to sodium, potassium, chloride, bicarbonate, phosphorous, and calcium in stability. If electrolytes are unbalanced, it might be an indication that the kidneys aren’t working correctly.
Full Blood Depend (CBC)
An entire blood rely is actually a rely of a cat’s purple and white blood cells and platelets.
The kidneys are accountable for producing a hormone known as erythropoietin that stimulates the manufacturing of purple blood cells. If the kidneys aren’t capable of produce all of the erythropoietin {that a} cat wants, the red-blood-cell rely could also be low.
If the reason for the kidney illness is an an infection or irritation, a CBC would present a rise in white blood cells.
If the underlying explanation for the kidney illness is a clotting dysfunction (which is uncommon), the platelet rely can be low.
Urinalysis
Urine is a window into kidney operate. A Urine Particular Gravity (USpG) take a look at will present how diluted or concentrated a cat’s urine is. A better quantity signifies that the urine is extra concentrated, and is an effective signal that the kidneys are nonetheless capable of preserve water.
A urine sediment take a look at can present if there may be protein, micro organism, blood cells, or kidney cells within the urine. Any a type of might be a sign of kidney an infection or injury.
A urine tradition can be essential as a result of cats with CKD usually tend to have urinary tract infections (UTIs).
Different exams
Your vet might also suggest X-rays or ultrasounds to search for kidney stones, cysts, or areas of lifeless tissue.
She or he will seemingly verify your cat’s blood stress. Hypertension might be each an indication and/or a explanation for kidney injury.
Not often, a vet could suggest a kidney biopsy to seek out out the kind of illness that your cat is affected by.
How is urine collected from a cat for a urinalysis?
You possibly can’t precisely ask a cat to pee in a cup, are you able to?
There are 3 ways of accumulating urine from a cat:
Non-absorbent litter
Your vet could suggest utilizing a non-absorbent cat litter in your cat’s standard field. The pee will simply settle within the backside of the litter pan, and you’ll tip the field so that each one the urine collects in a nook. You possibly can then suck up a pattern with a syringe or eye dropper.
If that doesn’t work, your vet will be capable of extract urine out of your cat utilizing:
Catheterization
Catheterization entails inserting a small tube into the cat’s urethra (the opening the place the pee comes out) up into the bladder. Cats will must be sedated for this process.
Catheterization may cause some irritation to the urethra, and may introduce micro organism from the surface world into your cat’s bladder. But it surely’s much less invasive than cystocentesis (beneath).
Cystocentesis
Cystocentesis entails inserting a really positive needle by way of your cat’s stomach wall into her bladder.
Whereas this process is taken into account secure and produces the “cleanest” urine pattern, not all cats will lie nonetheless for the process. So, this take a look at might also require sedation. Cystocentesis additionally requires a comparatively full bladder, and should necessitate using an ultrasound to find the pee throughout the bladder.
There’s a system that each one vets use to measure the development of kidney illness in cats. It’s known as the IRIS system, which stands for The Worldwide Renal Curiosity Society.
Staging kidney illness based mostly on a system like IRIS is beneficial. Figuring out the place a cat “is” in a progressive sickness like CKD, will help information the therapy plan.
The IRIS system breaks kidney illness down into 4 phases:
Stage I
On this earliest illness stage, a cat has no signs. His BUN and creatinine exams are regular. It’s uncommon to diagnose a cat with CKD at this stage as a result of there aren’t any outward indicators of sickness, and no change in his lab values. However CKD, caught at Stage I, has one of the best probability for profitable therapy.[17]
Typically CKD in Stage I is found by a vet merely palpating (feeling) the kidneys or seeing the kidneys on an X-ray or ultrasound. Typically a vet will discover {that a} cat’s blood creatinine is growing over time, even when it’s nonetheless within the regular vary. Protein that retains exhibiting up in urine may be one other signal.[18]
Cats in Stage I and II are usually handled with a prescription cat-food weight loss plan and monitored.
Stage II
Some cats can have began to drink extra and pee extra at Stage II. Your vet can see modifications in your cat’s blood work and urinalysis that point out modifications happening within the kidneys.
Your vet will in all probability wish to discontinue any drug that your cat is taking that might be dangerous to the kidneys (if potential). She or he will attempt to establish and deal with any infections that might be inflicting lack of kidney operate.
Stage III
Cats in Stage III usually seem sick. There’s extra waste within the blood work. Cats in Stage III (and in addition IV, beneath), may be given erythropoietin injections to assist with anemia. They are often given dietary supplements to assist with low potassium, and phosphorous binders to deal with excessive phosphorous.
Medicine that scale back nausea and vomiting will help a cat with a poor urge for food, or one who’s vomiting ceaselessly. Fluids may be given intravenously or beneath a cat’s pores and skin, to assist with dehydration. You possibly can be taught to provide your cat these drugs and fluids at dwelling.
Stage IV
Stage IV is the ultimate stage of renal failure when cats are sometimes in disaster.
What’s a prescription kidney weight loss plan?
Prescription kidney diets are designed with much less protein, phosphorus, and sodium than conventional cat meals to assist scale back the quantity of waste within the bloodstream {that a} cat’s kidneys should course of.
Prescription kidney diets are sometimes larger in water-soluable nutritional vitamins, fiber, and antioxidants to assist enhance a cat’s high quality of life.
Nevertheless, many cats are fussy about eating their therapeutic diets. Not consuming, even for a really quick time period, may cause a deadly liver illness in cats known as hepatic lipidosis.
Transition slowly out of your cat’s favourite meals to the brand new prescription weight loss plan. Heat the meals to make it extra engaging. Add vet-approved toppers, just like the juice from a can of tuna, or presumably bone broth. Regardless that prescription cat meals is dear, you will have to attempt completely different manufacturers to see if there may be one your cat likes.
However first discuss to your vet in case your cat just isn’t consuming. There could also be different choices, like including a phosphorous binder to his favourite meals as an alternative of utilizing the prescription weight loss plan, in case your cat is refusing to eat her particular meals.
No. Continual kidney illness can solely be handled, not cured. Any injury to the kidneys can’t be reversed.
That doesn’t imply there isn’t something veterinary science can do! There are many instruments in your vet’s toolbox that may assist lengthen and enhance your cat’s high quality of life:
Antibiotics
Antibiotics can be utilized deal with infections which have triggered kidney illness or are the results of kidney illness. Cats with CKD are inclined to develop bladder infections extra ceaselessly.
Potassium dietary supplements
Cats with CKD are inclined to lose potassium of their urine, which results in muscle weak point, stiffness, and a poor coat high quality. Low potassium may make CKD worse.
B nutritional vitamins
When the kidneys can not focus urine, water-soluble nutritional vitamins, like B12, get washed out in a cat’s pee. Supplementing with additional B nutritional vitamins may be very useful.
Blood-pressure reducing medicine
Hypertension may be brought on by CKD, and may trigger extra injury to kidneys. Angiotensin-converting enzyme (ACE) inhibitors, angiotensin receptor blockers (ARBs), and calcium-channel blockers (CCBs), are drugs that may assist do the job the kidneys are not capable of do.
Anti-nausea and anti-vomiting medicine, and urge for food stimulants
Cats who’re nauseous and vomiting usually don’t have any urge for food. These drugs will help a cat regain curiosity in his meals.
Anemia drugs
Many cats with CKD aren’t capable of produce sufficient purple blood cells of their bone marrow. Erythropoietin-replacement remedy will help stimulate the manufacturing of purple blood cells.
Drugs for proteinuria
Proteinuria is the lack of protein within the urine that could be a hallmark of CKD. Proteinuria may injury kidneys additional if it isn’t handled.
Phosphate binders
Phosphate binders, normally added to meals, will help “mop up” extra phosphate within the blood that’s brought on by CKD.
Fluids
Within the later phases of CKD, cats can’t drink sufficient to take care of wholesome hydration. Fluids can enhance their high quality of life.
Dialysis, extra formally often called hemodialysis, is a mechanical manner of purifying the blood.
Dialysis is a therapy alternative for people experiencing acute or persistent kidney failure. An individual who requires dialysis will want it for the remainder of their lives, or till they can get a kidney transplant.
A cat present process dialysis would have a catheter positioned in her jugular vein and her blood can be circulated by way of machine with a filter to take away the poisonous waste that the kidneys can not filter. Dialysis normally takes 5 to 6 hours per session and requires two to 3 classes per week, all beneath common anesthesia.
It may be tough to discover a heart that gives dialysis for animals, and particularly for cats. It’s also extraordinarily costly.
However extra importantly, dialysis may be very laborious on a cat’s physique, and can most definitely impression a cat’s high quality of life. For these causes, it isn’t normally advisable for cats who’ve persistent kidney illness.
Most causes of persistent kidney illness usually are not preventable.
What you are able to do is restrict your cat’s publicity to kidney-damaging issues, like lilies, human drugs, family cleaners, and antifreeze. Block entry to your storage, and lock up harmful substances.
You possibly can maintain your cat updated on vaccines, and heartworm and flea-control medications. Doing so will assist stop many bacterial and viral causes of kidney illness.
Restrict your cat’s publicity to different cats who may unfold sickness to your cat. The easiest way to try this is to keep your cat indoors.
Cats are amazingly resilient. Cats with as little as 5% kidney operate can survive for a surprisingly very long time.[19]
Many cats, particularly these recognized with CKD within the early phases, with way of life modifications and long-term administration of the illness, can go on to dwell a standard lifespan.[20]
Normally, CKD tends to progress slowly, and a few cats reply very properly to therapy. In case your cat has been recognized with CKD, she should have years of lively life left with therapy.
It may be laborious to know when the tip is close to for a cat within the closing stage of a illness like CKD. What are the indicators {that a} cat is close to dying? How do I do know if my cat is struggling? What’s the proper factor to do?
This extensively researched web site, created by a girl who had three cats with CKD, does an unbelievable job of answering a few of these more durable questions.
I discovered this web page, entitled “The Last Hours,” particularly useful. It outlines the indicators and signs that may accompany a cat with CKD close to the tip, and gives steerage as you navigate the tough choices that include loving a cat.
Tanya’s Comprehensive Guide to Feline Chronic Kidney Disease
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Daybreak LaFontaine is a lifelong animal lover who at all times appears to have a little bit pet hair in her keyboard. Her weblog, Kitty Contemplations, helps cat guardians higher perceive and look after the particular beings they share their lives and houses with. Her cat-products enterprise, Cat in the Box, sells stunning, well-made, and award-winning merchandise that she designed to satisfy the organic wants of cats.
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FOOTNOTES
[1] Weir, Malcolm Weir, et al. “Continual Kidney Illness in Cats: VCA Animal Hospitals.” Vca, vcahospitals.com/know-your-pet/kidney-failure-chronic-in-cats. Accessed 4 Oct. 2024.
[2] “Kidney Dimension.” Kidney Dimension – an Overview | ScienceDirect Matters, www.sciencedirect.com/topics/immunology-and-microbiology/kidney-size. Accessed 4 Oct. 2024.
[3] “Overview of Kidney Problems.” College of Rochester Medical Middle, www.urmc.rochester.edu/encyclopedia/content.aspx?contenttypeid=85&contentid=P08231. Accessed 7 Oct. 2024.
[4] “Understanding Kidneys, Details and Features.” ERA, 10 Oct. 2023, www.era-online.org/publications/understanding-kidneys/.
[5] Kearley, Michael. “Kidney Illness in Cats.” PetMD, 9 Could 2022, www.petmd.com/cat/conditions/urinary/kidney-disease-cats.
[6] “Continual Kidney Illness.” Cornell College School of Veterinary Medication, www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/chronic-kidney-disease. Accessed 3 Oct. 2024.
[7] “Pyelonephritis in Cats: VCA Animal Hospitals.” Vca, vcahospitals.com/know-your-pet/pyelonephritis-bacterial-infection-of-the-kidney-in-cats. Accessed 8 Oct. 2024.
[8] “Ticks and Your Cat.” Cornell College School of Veterinary Medication, www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/ticks-and-your-cat. Accessed 8 Oct. 2024.
[9] Sharon M. Gwaltney-Brant, Chapter 18 – Renal toxicity, Editor(s): Ramesh C. Gupta, Veterinary Toxicology (Second Version), Tutorial Press, 2012, Pages 264-277, ISBN 9780123859266,https://doi.org/10.1016/B978-0-12-385926-6.00018-1. https://www.sciencedirect.com/science/article/pii/B9780123859266000181
[10] “Not Simply 4 Paws Animal Hospital: Veterinarian in Canyon Lake, CA.” Not Simply 4 Paws Animal Hospital | Veterinarian in Canyon Lake, CA, notjust4pawsanimalhospital.com/dehydration-and-kidney-failure. Accessed 8 Oct. 2024.
[11] “Getting older and Kidney Illness.” Nationwide Kidney Basis, 12 Aug. 2024, www.kidney.org/aging-and-kidney-disease.
[12] Weir, Malcolm Weir, et al.
[13] ibid.
[14] Kearley, Michael. “Kidney Illness in Cats.” PetMD, 9 Could 2022, www.petmd.com/cat/conditions/urinary/kidney-disease-cats.
[15] “Renal Amyloidosis.” Cornell College School of Veterinary Medication, www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/renal-amyloidosis. Accessed 4 Oct. 2024.
[16] “SDMA in Cats: How Helpful Is It and When to Use It.” Exploring SDMA Significance and Optimum Utility in Feline Diagnostics, www.moichor.com/blog-post/sdma-in-cats-how-useful-is-it-and-when-to-use-it. Accessed 8 Oct. 2024.
[17] Case, Jamie, and Barri J. Morrison. “Kidney Failure in Cats: Signs, Phases and Causes.” PetMD, 29 July 2024, www.petmd.com/cat/conditions/urinary/kidney-failure-in-cats.
[18] “Testing for Kidney Illness: VCA Animal Hospitals.” Vca, vcahospitals.com/know-your-pet/kidney-disease-testing. Accessed 9 Oct. 2024.
[19] Case, Jamie, and Barri J. Morrison..
[20] Kearley, Michael. “Kidney Illness in Cats.”.
