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Research-backed probiotic strains
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SCIENCE-BACKED
Advanced Cat Probiotic – Digestive, Kidney & Immune Support
1,215 Reviews
Sale price
€43,95
Regular price
€61,95
4.2 OZ / 2 MONTH SUPPLY
Science-backed probiotic formula designed to support your cat's health from the inside out
- Supports healthy kidney function
- Promotes firm stools & healthy digestion
- Helps maintain skin & coat health
- Delicious fish flavour even picky like
Product Information
Our vet-formulated probiotic delivers 6 targeted strains and 500 million CFU, plus inulin prebiotics, digestive enzymes, omega-3 salmon oil, and soothing marshmallow root, to support your cat's health from the inside out.
- Promotes Healthy Digestion -- Pumpkin powder and marshmallow root help soothe the gut lining, while 6 live probiotic strains support balanced bacteria and comfortable, regular digestion
- Supports Immune Function -- A balanced gut microbiome strengthens your cat's natural defenses and day-to-day resilience
- Boosts Nutrient Absorption -- Pancreatin Fungal 4X enzymes and prebiotic inulin help your cat get more from every meal
- Maintains Energy & Vitality -- Norwegian salmon oil adds omega-3s to support coat health and energy, so your cat can feel and act like themselves
Directions for Use
- Scoop -- Measure 2 scoops (1g each) of powder
- Sprinkle -- Add directly to your cat's food
- Mix -- Stir in and serve
Two scoops daily. Best mixed with wet food. For dry food, add a small splash of water to help the powder stick.
Ingredients
Probiotic Blend (500 Million CFU) -- 5mg L. acidophilus, L. casei, L. plantarum, B. bifidum, L. lactis, L. fermentum
Prebiotic Inulin (from Artichoke) -- 50mg
Pancreatin Fungal 4X (Digestive Enzymes) -- 25mg
Marshmallow Root -- 10mg
Omega-3 Norwegian Salmon Oil Powder -- 100mg
Pumpkin Powder -- 200mg
Other Ingredients: Bioflavor (Mau Hydrolyzed Fish) -- 1,610mg
Shipping & Guarantee
Shipping Free shipping on orders over $75. Orders are processed within 1-2 business days and delivered within 2-4 business days from our US warehouse.
60-Day Satisfaction Guarantee Try it risk-free. If you're not completely satisfied within 60 days, contact us for a full refund, no questions asked.
What To Expect
Every cat is different, but healthy gut balance doesn't happen overnight, it builds with daily use for lasting results.
Month 1: Foundation
Good bacteria take hold. Subtle shifts in appetite or energy.
Month 2: Progress
Real changes. Eating better. More energy. Brighter eyes.
Month 3: Vitality
Full transformation. Shiny coat. Healthy weight. Your cat again.
What Our Customers Say
Game changer for my senior boy
My 15-year-old Winston has kidney disease and I've tried every supplement under the sun with no luck. This probiotic actually works. His excessive drinking has decreased so much and he has way more energy now. I'm just so grateful to see him acting more like his old self again!
Sarah M.
Verified Buyer
Picky eater approved!
Mochi is THE most finicky cat ever and refuses anything that smells weird to her. She had zero issues with this sprinkled on her food and her loose stools are finally under control after about 3 weeks. Highly recommend for picky kitties.
John D.
Verified Buyer
Worth every penny
I was super skeptical after spending a fortune on other products that did nothing for Smokey's digestive issues. This is the only thing that's actually helped. No more constant vomiting and his appetite is back to normal. My little guy is so much happier.
Emma L.
Verified Buyer
Finally solved Bella's tummy troubles
This has been a lifesaver for my girl's digestion!! She had diarrhea constantly no matter what food I tried and now she's been completely regular for over a month. Plus she seems to actually like the taste because she eats faster when I add it.
Mom of Bella
Verified Buyer
Why PetLonga Works When Others Don't
Features
Research-Backed Strains
High CFU count
Clean Ingredients
Cat-approved flavor
Feline-Focused
PetLonga
Others
Unproven strains
Weak dosing
Cheap fillers
Cats refuse it
Generic formulas
Got Questions? Here's What Cat Owners Ask Most
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 30 seconds a day.
Simply add 2 scoops to 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. It has a natural fish flavour which even picky eaters like.
No pills to force down. No syringes. No fighting at mealtime.
Do I have to sign up for a subscription?
Yes — we now offer a subscription option in addition to one-time purchases.
We introduced subscriptions because consistency is one of the most important parts of building an effective daily routine for kidney support. Probiotics work best when used continuously over time, and subscriptions help make sure your cat never misses a day.
You can still choose:
- One-time purchase — no recurring charges or commitments
- Subscribe & save — automatic deliveries on your preferred schedule
The subscription is fully flexible, so you can choose the delivery frequency that works best depending on how many cats you're giving it to and how quickly you go through each jar. You can also pause, change, or cancel anytime.
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. Every ingredient is selected based on published research, not trends.
The gut-kidney connection is real. Studies show that harmful compounds produced in the gut pass into the bloodstream, forcing the kidneys to work harder over time. Targeted probiotics help break down these compounds before they reach the kidneys -- reducing the burden on an already stressed system.
Our 6-strain probiotic blend delivers 500 Million CFU of strains studied for their role in gut balance, toxin metabolism, and immune support.
Prebiotic inulin (from artichoke) feeds and sustains beneficial bacteria so they actually colonize -- not just pass through.
Pancreatin Fungal 4X enzymes support complete nutrient breakdown and absorption, reducing digestive stress on your cat's system.
Pumpkin powder and marshmallow root add a soothing layer of gut support, helping maintain a calm, healthy digestive environment.
This is not a generic blend. It is a targeted formula built 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 60-day money-back guarantee work?
Simple. If you're not happy, you get your money back.
Try it for up to 60 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.