Best Probiotics for Cats

If you are the owner of a kitty who has recently been having some health problems and has been diagnosed with a renal disease, your veterinarian probably would have recommended a renal prescription diet, but why? Well, there is lots of research which suggests that diets which are restricted in protein can lengthen kidney function.

But, there is a lot more to it. Finding the best cat food for kidney disease is very important; the consequences of bad dietary choices for your kitty who is suffering from kidney disease can be very dangerous.

Cats are obligate carnivores. What this means is that they cannot survive and get nourishment without protein… they need it to live and function normally. A good amount of decent quality animal proteins is essential for your kitty’s immune system to function properly and to produce the right number of hormones. Unlike other mammals such as dogs, cats cannot get energy from anything other than animal or plant proteins… it is super important.


Probiotics for Cats Comparison Table

Product NameFeeding DirectionsPricing
Purina Fortiflora Nutritional Supplement for CatsFeed 1 packet daily under the supervision of your veterinarianClick Here
Digestive Aid Plus PrebioticStart with a 1/4 serving and gradually work up to a full serving by 6 weeks. Monitor your cats progress and stick with it, their healthy will improve.Click Here
VetriScience Laboratories Mega Probiotic1/2 capsule mixed with foodClick Here
Proviable DC for Cats and Dogs1 capsule daily or as directed by your veterinarianClick Here
FurryPals Natural Probiotics For PetsOnce per day or as recommended by a veterinarian. Sprinkle recommended dosage in wet or dry food and mix well.;

Cats over 10lbs: 1/4 tsp (1 scoop)
Cats under 10lbs: 1/8 tsp (1/2 scoop)
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Pet Ultimates Probiotics for CatsGive one scoop per feeding. Sprinkle on food, mix well.Click Here
Probiotic Miracle for Dogs and CatsWELLNESS DIRECTIONS:
Add 1 scoop of Probiotic Miracle® for every 50lbs of your pet's weight.

Start with half the suggested dose below and increase to the full amount after 1 week. For best results, use with Enzyme Miracle® to provide complete digestive support for your pet.

If recovering from illness, infection, allergies, GI-related issues, or antibiotic therapy, give 3 scoops twice per day until you notice an improvement in your pet's condition. Then, continue with the wellness dosage.
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Purina Fortiflora Nutritional Supplement for Cats is widely considered one of the best probiotics for cats who suffer from irritable bower disease. Purina Fortiflora is a nutritional complement which contains a microencapsulated form of enterococcus which is necessary for combatting diarrhea or messy stools.

Because it only contains a small number of colony-forming units (CFUs) this product is generally not regarded as a dedicated cat probiotic. However, it is still a great nutritional supplement which helps promote optimum nutrition for your kitty, especially since it is enriched with vitamins C, E and taurine.

It also restores regular intestinal fitness and stability and carries proteins, nutrients and minerals. This is best mixed up with food.


  • Easy-to-administer powder.
  • Enriched with vitamins.
  • Contains Enterococcus faecium


  • Not a dedicated probiotic.

NUSENTIA Probiotic Miracle for Dogs and Cats is a first-class pet probiotic blend which is proven to work. It is 100% natural, vegetarian and contains no fillers, flavourings, by-products, gluten, dairy or eggs.

As soon as your kitty begins to take this probiotic with food, you will see an instant improvement over time with less digestive problems due to the enhanced digestive ability this probiotic provides. It also improves coat, pores, skin and breath in the first two weeks.

It is an ultra-concentrated formula which is packed full of useful bacteria which immediately get to work. It has three billion CFUs coming from seven carefully selected species of live and useful bacteria, with added insulin to assist the bacteria for maximum effectiveness.


  • No allergens.
  • 7 different species.
  • Great all-rounder.


  • Not cat-specific.

Premo Probiotics for Cats is a pretty good probiotic brand, but it only contains 1 billion CFUs per measure of the powder as opposed to other brands which contain between two and five billion CFUs. However, it holds a GMP certification for its state of the art production facility and certification from the NPA due to the quality of its probiotics.

This is an effective product which provides your kitty with excellent probiotics which are highly effective at promoting digestive health and reducing ailments associated with gastrointestinal problems. It also comes with a 60-day refund guarantee, which is always a bonus!

This is a great product if you’re trying out probiotics for the first time and want to try your cat on some which has a lower CFU count, to see how it goes and how your cat responds.


  • Professionally certified.
  • Contains essential bacteria.
  • Contains prebiotic inulin.


  • Low number of CFUs.

VetiScience Laboratories Mega Probiotic for Dogs and Cats features seven different probiotic organisms and, in addition, fructooligosaccharides, so it is a great general pet probiotic which is designed for both dogs and cats. Its unique formula makes it the ideal probiotic for cats suffering from diarrhea, flatulence or food intolerances and is highly recommended by veterinarians.

It comes in capsule form, making it much easier to administer and very quickly dissolves when ingested. It can also be mixed and broken down into food; your kitty does not need to take this capsule in solid form.

The 500mg capsules contain 5 billion CFUs – a huge amount – which includes L acidophilus, L plantarum, B bifidum, K brevis, B longum and L casei.


  • 5 billion CFUs per serving.
  • Can be broken down into food.
  • Particularly good against diarrhea.


  • Capsule form not as good as powder.

This product is packed full of gut-friendly bacteria which help to restore the normal balance of bacterial flora in your kitty’s gut and minimize the risk of diarrhea, especially diarrhea which is caused by antibiotics. This is actually a brand which veterinarians recommend buying if your cat is on a course of antibiotics.

In addition to the probiotics there are prebioitic ingredients which help to strengthen your cat’s digestive function, further enhancing overall gut health and eliminating symptoms of gastrointestinal distress.

Although the packaging says that this is only available through veterinarians, it is available commonly online. This really does go to show just how good this product is and that it is well recommended by vets.


  • Great for gastrointestinal problems.
  • 5 billion CFUs per serving.
  • Contains two prebiotics.


  • Best used with antibiotics.

FurryPals Natural Probiotics for Pets may be specially designed for dogs, but it is very effective in cats and it has proven benefits among the feline community. With a combination of probiotic organisms and prebiotic molecules, it is great at promoting a healthier overall digestion in both cats and dogs, whilst eliminating the symptoms of gastrointestinal distress.

Coming in powder form, it does not change the taste of your cat’s food and it is super convenient to administer. With a 3-month guarantee, you can be safe in the knowledge that if this product does not work for your kitty, you haven’t lost anything.

It contains 2 billion CFUs per scoop which is quite low, however it has lots of bacteria such as L acidophilus, L rhamnosus, B lactis, B breve and B animalis along with prebiotic inulin.


  • Can be added to food or water.
  • 3-month guarantee.
  • 2 billion CFUs per serving.


  • Specially designed for cats.

PetUltimates Probiotics for Cats is a brilliant product for cats who are suffering from diarrhea. Each scoop of PetUltimate’s probiotics blend contains a massive number of bacteria which are known to help aid digestion… 5 billion to be exact!

PetUltimates’ probiotic blend contains twenty different kinds of bacteria which support your cat’s health, which is great when you consider that most brands only contain one! This brand is custom-formulated with carefully selected species to provide maximum effectiveness and is manufactured in small batches to promote freshness.

It is a powder which is sprinkled onto food, eliminating any problems associated with trying to feed your kitty a capsule or tablet!

These twenty different bacterial species accounts for 5 billion CFUs per scoop. Plus, with the addition of the enzyme alpha galactosidase and beta glucan, this is quite clearly one of the very best feline probiotic products.


  • No sugar fillers or artificial ingredients.
  • 5 billion CFUs per scoop.
  • 14-day refund guarantee.


  • Some cats may not like the powder.

Kidney Disease Prognosis

Most cats will survive kidney disease for months or years after they have been diagnosed, but kidney disease is generally not curable. It is a progressive and chronic disease and, over time, it is fatal in cats, because the disease causes kidneys to weaken.

That being said, however, it is possible to help prolong your kitty’s life for as long as possible and lead a quality life by feeding the right diet, with the right foods and taking the right care of your kitty. Having a kitty suffering with kidney disease is not easy… it will require a lot of care on your part, but this can be relieved by feeding the best cat food for kidney disease.

With all of the above in mind, here are our reviews of the best cat foods for kidney disease available on the market right now. These specially formulated renal foods tick all the boxes and will help your kitty on the road to recovery from kidney disease. Not all of these are specially-formulated renal foods, however, some are just regular cat food brands!

Renal Diets

Renal diets contain added potassium, lower sodium, low phosphorus and extra Omega-3 fatty acids, in addition to restricted protein. Although all of these things are good for your kitty’s condition, what is not good is the limited amount of protein.

There is no one diet which is good for all cats who have kidney disease, some factors depend on your individual cat. What is important, however, is that your cat is getting a good quality protein, rather than the amount of protein they are getting. So, if your kitty has been diagnosed with kidney disease, you should look at swapping out your kitty’s current food for a food which has high quality protein sources.

Don’t forget the importance of water, either; water is important to preserving kidney function and tissue. Cats with renal problems will drink more water, but they cannot retain this water as efficiently as before. But, the buck does not stop here – you need to also make sure your kitty is getting plenty of moisture through their food.

This means that you can no longer feed dry food or, if you do, feed as little as possible. If you do feed dry food, try adding water or protein-based broths to it such as chicken or fish broth. If you have a kitty who loves dry food, try moving them onto some Soft Dry Cat Food instead, which does have moisture.

Restricting phosphorus is also important, because the high amount of phosphorus found in high protein diets can speed up the decline of your kitty’s kidneys. When looking for the best cat food for kidney disease, look for a phosphorus count lower than 0.6% on a dry-matter basis or between 0.7-1.2 grams per 1000kcal.

How Do Renal Diets Help?

Renal diets help your kitty’s kidney problems in two primary ways.

Through low quantity, high-protein sources

  • As we have already mentioned, because your kitty will now be on a limited protein diet, it is super important to provide lower quantities of protein which are higher in quality. You may find the Best Limited Ingredient Cat Food useful, too.
  • When your kitty eats food, protein is broken down and there are some toxic by-products which pass out through the urine. But, when your kitty has kidney disease, they cannot do this job properly and so the toxins build up in blood and cause renal failure and illness.
  • The point of a limited-protein diet is to reduce the production of toxins so that your cat feels better in the long run. Cats must continue to have protein in their diet because they are obligate carnivores; the best cat food for kidney disease contains less protein than regular foods but are high quality, so there is less protein to cause problems but your cat is still benefitting from a quality protein source.

With restricted phosphorus

  • Excess levels of phosphorus, which is found in animal-based proteins, can hasten kidney failure, so restricted phosphorus found in these renal foods can help slow it down and protect the kidneys from more damage. Restricted phosphorus helps protect the kidneys from more damage and slows the progression of kidney disease.

What is important to remember is that the best cat food for kidney disease are specially formulated and meet the above criteria, providing significant benefits for your kitty in terms of improving their kidney disease whilst reducing the levels of toxins in the bloodstream.

A Personal Note

You may find that the need to provide your kitty with a limited-protein wet cat food which is low in phosphorus to be quite difficult and complicated, but it is necessary. I get it. Personally, I don’t like complicated cat foods and I am not a fan of those posh-sounding foods which are packed full of nice fruits and vegetables; your obligate carnivore kitty doesn’t need them and has no use for them!

But, I understand – and you should too – that it is important to feed your cat a food which they will eat, even if there are some ‘bad’ ingredients in them. If your kitty has kidney disease, it is more important to limit the protein, phosphorus and feed a wet food than it is to filter out ‘bad’ ingredients.

Kidney disease means that the foods you can feed your kitty are already limited, so you do not need to overcomplicate it more by worrying about ingredients. Your cat’s clinical health is more important as kidney disease can be deadly.

Kitties can be stubborn and if you only provide food which your cat does not like, he / she will not eat it, especially if your kitty is feeling poorly due to kidney problems. It is more important to get food into your cat than it is to let your kitty go hungry based off of your principles.

Benefits of a Renal Diet

There are obvious benefits when it comes to feeding a renal diet. Although people have little enthusiasm for renal foods, they help your cat get better. A proper renal diet can slow the progression of kidney disease, extend life and reduce illness and symptoms such as vomiting and appetite loss.

Although you may not be a fan of the quality of renal diet foods, you should keep an open mind. They will work to help your kitty’s condition and prognosis improve and, what’s most important, your cat will feel so much better on these diets. It is important that your cat remains comfortable and symptom-free in-order for him or her to lead a normal life.

Just like there is Cat Food for Sensitive Stomachs and Cat Food for Urinary Health, there are cat foods available especially for kidney disease.

Kidney disease is a complicated disease and we are no specialists, so it is important to follow the advice of your veterinarian and listen to what he or she has to say about it. Kidney disease is not clear-cut, and it has two distinct types and, as with most things, how your cat will cope with the disease is circumstantial.

Kidney disease is the leading cause of death in cats and most kitties will suffer from it with age, or suffer some form of renal failure. It is just a natural part of life, unfortunately.

The Round Up

Probiotics are great for both cats with digestive or gastrointestinal issues or cats who are perfectly healthy. In general, probiotics should be fed alongside your kitty’s food when he or she is healthy, because they can aid digestion and prevent problems from popping up.

For cats on antibiotics, probiotics help restore some of the healthy gut flora which antibiotics destroy.

Rebecca Welters

Yes, I am that weird cat lady with 200 cats and live in the darkest corner of the city where no one dares to go! Joking! But I am a cat lover and have 2 Ragdoll cats called Toby, he's 3 years old and Dory, she's 8 years old. I'm 36 years old and live in the quiet town of Washington.

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