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Gut-Kidney Shield | Advanced Probiotic For Cats
4.6 | 1,259+ Reviews
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1 JAR: 2 MONTHS
$24.50 / Month + $4.95 Shipping
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2 JARS: 4 MONTHS
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3 JARS: 6 MONTHS
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90-Day Money-Back Guarantee
Try it risk-free. If you don't see a difference in your cat's energy, appetite, or overall wellbeing within 90 days, just reach out. We'll refund every penny, no questions, no hassle. We're confident because we've seen what this formula can do.
How It Supports Your Cat's Kidneys
Most probiotics stop at digestion. This one goes further.
Your cat's gut and kidneys are directly connected. When harmful compounds build up in the gut, they pass into the bloodstream, and the kidneys have to work overtime to filter them out.
Our targeted strains help break down these compounds in the gut, before they ever reach the kidneys. Less burden. More support. A smarter approach to kidney health that works with your cat's body, not against it.
Easy To Use
Give one capsule daily.
Break it open — Twist or pull apart the capsule to release the powder inside.
Sprinkle over food — Add the powder to your cat's regular meal, wet or dry.
Mix it in — Stir it through so it blends evenly. Let your cat enjoy.
Works With Your Current Treatment
The Gut-Kidney Shield is designed to work perfectly alongside whatever you are already doing for your pet. Whether you are following a strict medical protocol or simply providing standard care, this is the extra support they need.
Enhances Vet Protocols: It’s the "missing piece" that works with renal diets (Hill’s, Royal Canin, Purina), phosphorus binders, and sub-Q fluids.
Complements Standard Food: If your pet is on a normal diet, this provides targeted nutrition they won't get from kibble alone.
Nutritional, Not Medicinal: Because it is a nutritional supplement rather than a drug, there are no side effects or drug interactions to worry about.
Keep following your vet’s expert advice, just add the support your pet has been missing.
Why Even Picky Eaters Like It
We formulated this to disappear into mealtime.
You can break open the capsule and sprinkle the powder over the regular food you're always giving. So no difficulty of forcing the whole capsule down the throat.
The powder is fine and blends quickly, without grit, clumps, or change in texture. It has a light natural chicken flavor. Enough to appeal. Not enough to overwhelm.
Even picky eaters eat it without hesitation.
Research-Backed Ingredients
Probiotic Strains (5 Billion CFU total):
Enterococcus Faecium
Lactobacillus Casei
Bacillus Subtilis
Bifidobacterium Animalis
Lactobacillus Paracei
Lactobacillus Reuteri
Bacillus Licheniformis
Lactobacillus Brevis
Lactobacillus Fermentum
Bifidobacterium Longum
Active Ingredients:
Inulin Fructooligosaccharides/FOS (30mg)
Digestive Enzymes (30mg): Amylase, Protease, Lipase, Cellulase, Hemicellulase, Papain, Bromelain
Vitamin E (5IU)
Other Ingredients:
Brewer's Yeast Powder
Garbanzo Flour
Powdered Cellulose
Silicon Dioxide
Magnesium Stearate
Microcrystalline Cellulose
Natural Chicken Flavoring
Expected delivery in 3-6 business days
Vet-Reviewed Formula
"The gut-kidney connection is one of the most important discoveries in feline nephrology. When we support the gut microbiome with the right probiotic strains, we can reduce the toxic load on the kidneys. That's why I recommend this formula as kidney support to my clients."
Dr. James Mitchell
US DVM, Vet Consultant to PetLonga.
What to expect
87% of PetLonga customers saw positive results within 3 months of daily use.
A happier, healthier cat – with each capsule
Kidney support
Balanced gut health
Improved energy
Normal water consumption
Month 1
Gut support begins. Probiotics, prebiotics, and postbiotics help support the microbiome.
Month 2
Appetite starts to return. Many owners notice their cat eating more consistently, drinking less excessively, and showing more interest in daily activities.
Month 3
Visible difference. Improved energy levels, healthier coat, and a more alert, comfortable cat.
We have impacted over 10,000 cats in the US
Quality You Can Trust
GMP-Certified Facility
Manufactured to pharmaceutical-grade standards
Scientifically Selected Strains
Chosen specifically for the gut-kidney axis
Feline-Focused Formula
Dosages optimized for cats, not humans or dogs
Shelf-Stable
No refrigeration required, stays effective for 2 years
Research-backed active ingredients
Thousands of 5-Star Reviews*
Don’t just take our word for it - see what other cat owners are saying about their results with the Gut-Kidney Shield - Advanced Probiotic.
5.0
Finally found something that works
My 12-year-old tabby was diagnosed with early kidney issues last year. The vet said to watch her diet and keep her comfortable. I started researching and found this. After about 6 weeks, her energy is noticeably better and she's eating like she used to. Even my vet was surprised at her last checkup. I just wish I'd found this sooner.
Linda B. Verified Buyer
5.0
Recommend!
Our cat Oscar started throwing up a few times a week and sleeping way more than usual. Blood tests showed his kidneys were under stress. We changed his food, but the real difference came after adding this. Within 3 weeks the vomiting stopped. He's playing again, eating well, and acting like himself. Wish I'd found this sooner.
Rachel T. Verified Buyer
5.0
Prevention before it's too late
I lost my last cat to kidney failure at 11. It happened fast and I had no idea until it was too late. My new girl just turned 7, and I promised myself I'd be proactive this time. She's healthy now and I want to keep it that way. This gives me peace of mind knowing I'm supporting her kidneys before there's a problem. Easy to give, she eats it no issue.
Adrianna T. Verified Buyer
Frequently asked questions
What benefits can I expect to see in my cat?
Most cat owners notice improvements within the first 1-3 months of daily use. Common benefits include:
Improved appetite — Cats often start eating more consistently, even those who've become picky or lost interest in food.
More energy — Less lethargy, more willingness to play, and a return to normal daily activity.
Normalized drinking habits — Less excessive thirst and more balanced water intake.
Better digestion — Fewer stomach issues, more regular bowel movements, and less vomiting.
Healthier coat — Shinier, softer fur as nutrient absorption improves.
Improved comfort — A more relaxed, content cat overall.
Results vary depending on your cat's age and current kidney health. Some owners also report improved bloodwork results at vet checkups after consistent use.
Are your cat supplements easy to use?
Yes—it takes less than 10 seconds a day.
Simply open the capsule, sprinkle the powder over your cat's food, and mix it in. That's it.
The powder blends quickly into wet or dry food with no grit or clumps. There's no strong smell or bitter taste, so most cats eat it without even noticing.
No pills to force down. No syringes. No fighting at mealtime.
Just one capsule daily, mixed into their regular food.
Does it works together with other kidney treatments?
The Gut-Kidney Shield is designed to work perfectly alongside whatever you are already doing for your pet. Whether you are following a medical protocol or simply providing standard care, this is the extra support they need.
Enhances Vet Protocols: It’s the "missing piece" that works with renal diets (Hill’s, Royal Canin, Purina), phosphorus binders, and sub-Q fluids.
Complements Standard Food: If your pet is on a normal diet, this provides targeted nutrition they won't get from kibble alone.
Nutritional, Not Medicinal: Because it is a nutritional supplement rather than a drug, there are no side effects or drug interactions to worry about.
Keep following your vet’s expert advice, just add the support your pet has been missing.
What makes this probiotic different from others?
Most probiotics fail before they even reach your cat's gut. 93% of standard probiotic bacteria are destroyed by stomach acid. You're paying for bacteria that never arrive where they're needed.
The Gut-Kidney Shield solves this with spore-forming "bodyguard" strains, Bacillus subtilis and Bacillus licheniformis. These create a protective shell that survives stomach acid, heat, and bile, escorting the fragile kidney-supporting strains safely into the gut. Even when you open the capsule and sprinkle it on food, the bacteria reach the gut alive.
Most kidney probiotics also use generic digestive strains with "kidney" on the label, formulas built for upset stomach, not for reducing toxic load on the kidneys. The Gut-Kidney Shield contains Lactobacillus reuteri, studied for its ability to compete with toxin-producing bacteria, and Bifidobacterium longum, which helps support gut barrier integrity so fewer waste products reach the bloodstream.
No refrigeration required. No capsules to force down. Just open, sprinkle on food, and know it's actually getting where it needs to go.
Does this need to be refrigerated?
No. The Gut-Kidney Shield is shelf-stable for up to 2 years at room temperature.
Most probiotics require refrigeration because the bacteria are fragile, they die when exposed to heat during shipping or storage. That's why many arrive dead before you even open the bottle.
Our formula uses spore-forming bacteria that create a natural protective shell. This shell keeps them dormant and stable until they reach your cat's gut, where they activate and get to work. No cold chain shipping required. No rushing to the fridge when the package arrives.
Store it in a cool, dry place and it stays effective until the expiration date.
Will the bacteria survive stomach acid if I open the capsule and sprinkle it on food?
Yes. That's exactly how it's designed to be used.
Most probiotics require you to swallow the capsule whole because the bacteria inside are fragile, stomach acid destroys them within minutes. That's a problem when your cat won't swallow pills.
The Gut-Kidney Shield uses spore-forming bacteria that create their own protective shell, called an endospore. This natural armor makes them impervious to stomach acid, heat, and bile. They don't need the capsule for protection, they protect themselves.
Open the capsule, sprinkle the powder on wet food (or dry food mixed with a little bit of water), and the bacteria will pass through the stomach intact. They only activate once they reach the gut, where conditions signal them to "wake up" and start working.
No pill pockets. No forcing capsules down. Just sprinkle and serve.
Do I have to sign up for a subscription?
No. We don't offer subscriptions at the moment, every order is a one-time purchase. No commitments, no recurring charges.
That said, consistency is key for kidney support. It takes time for probiotics to build up in your cat's system and deliver real results.
That's why we recommend stocking up so you don't run out mid-routine. A 4-6 month supply keeps you on track without gaps, and gives your cat the best chance to see lasting benefits.
What are other cat owners saying?
Cat owners are seeing real results—and sharing them:
"Her bloodwork actually improved." — Linda M. Noticed better energy, healthier coat, and improved kidney values after two months of daily use.
"Stopped the vomiting and lethargy." — James K. His cat's digestion improved within weeks, with more energy and consistent appetite.
"Prevention before it's too late." — Rachel T. Started using it proactively after losing a previous cat to kidney failure. Peace of mind knowing she's supporting her cat's kidneys early.
The most common feedback we hear: improved appetite, more energy, and cats that actually eat it without a fight.
Is this formula science-backed?
Yes. The ingredient are selected based on published research, not trends.
The gut-kidney connection is real. Studies show that harmful compounds build up in the gut and pass into the bloodstream, forcing the kidneys to work harder. Targeted probiotics help break down these toxins before they reach the kidneys.
Our 10-strain probiotic blend (5 Billion CFU) includes strains like Lactobacillus Reuteri, Bifidobacterium Longum, and Lactobacillus Paracei—each studied for their role in gut health, toxin metabolism, and immune function.
Prebiotic FOS feeds beneficial bacteria so they colonize and thrive, not just pass through.
Digestive enzymes support complete nutrient breakdown and absorption, reducing stress on your cat's system.
This isn't a generic blend. It's a targeted formula designed to support kidney health from the inside out.
Do you offer free shipping?
Yes, on orders over $74.95, shipping is completely free.
Most customers qualify by stocking up with 2 jars, which also ensures you don't run out mid-routine.
Orders under $74.95 ship at a flat rate calculated at checkout.
How does the 90-day money-back guarantee work?
Simple. If you're not happy, you get your money back.
Try it for up to 90 days. If you don't see a difference in your cat, or you're not satisfied for any reason, just reach out to our support team.
No hoops to jump through. No awkward questions. We'll refund your purchase.
We offer this because we're confident in the formula. Most customers see real results. But if it's not the right fit for your cat, you shouldn't be stuck paying for it.