
"First firm poop in three months. I actually cried."
Biopurr®
1 fl oz / 30 mL
Only sold at Biopurr.com — never on Amazon.
Beware of fake Biopurr listings.
Real Biopurr is only sold here at Biopurr.com. Liquid probiotics sold on Amazon and third-party marketplaces have been found to contain different ingredients than advertised — and may not be safe for your cat.
How long until I see results?
Most cat parents see firmer stool and fewer hairballs within 2–4 weeks. Coat shine and energy improvements typically show up around weeks 6–8. Probiotics work best with daily consistency.
What if my cat refuses the drops?
Biopurr is virtually flavorless and most cats don't notice it. If your cat is picky, mix the drops into wet food, broth, or a small treat. The dropper makes dosing easy.
Is it safe for senior cats and kittens?
Yes — safe for all life stages. Senior cats actually tend to benefit most because gut bacteria diminishes with age. For kittens under 8 weeks, check with your vet first.
Shipping & Returns
Free shipping on 3+ bottle orders. Single-bottle orders ship for $4.99 in the US. Every order is backed by our 90-day visible-improvement guarantee — if your cat doesn't visibly improve, we refund every cent. No conditions.
WHAT TO EXPECT
Two drops a day. That's the whole protocol. Here are the three easiest ways to give it.
Add 2 drops to wet food. Virtually flavorless — most cats don't notice.
Tilt head back gently and give 2 drops. Easier than pilling — no struggle.
For picky cats. Mix into a small piece of wet treat or pâté.
Daily use is key — probiotics work best with consistency.
SCIENCE-BACKED RESULTS
Firmer stool, less smelly. Fewer hairballs. The first thing most cat parents notice — usually within 2 to 4 weeks.
Gut bacteria affect mood through the gut-brain axis. As her gut balances, anxious vocalizing and hiding tend to fade.
Compounding effects over time — shinier fur, easier movement, the cat that acts like herself for longer.
*Results vary by cat, age, and consistency of use.
This product is a nutritional supplement for cats. Not intended to diagnose, treat, cure, or prevent any disease. Always consult your vet before starting any new regimen.
PROOF YOU CAN SEE AT HOME
Cat parents tell us these are the first things they notice — usually within 2 to 4 weeks.
Less stinky litter box
No more 3am hairballs
She wants to play again
Coat is soft again
OUR PROMISE
Or every cent back. If your cat doesn't visibly improve in 90 days, we refund you. No conditions.
See the science behind it →WHAT'S INSIDE EVERY BOTTLE
Each ingredient was selected for maximum gut-brain impact in cats.

7 CLINICALLY STUDIED STRAINS
Enterococcus faecium, Lactobacillus acidophilus, Lactococcus lactis, Bifidobacterium longum, Lactobacillus casei, Bifidobacterium brevis, Bacillus coagulans — selected specifically for feline gut-brain support.

FEEDS AND SUSTAINS GOOD BACTERIA
A natural prebiotic fiber that feeds and sustains the probiotic strains so they actually colonize and thrive in your cat's gut.

BROMELAIN & PAPAIN
Reduces gut inflammation and maximizes nutrient absorption so your cat actually gets the full benefit of every meal.

IMMUNE RESILIENCE SUPPORT
Strengthens your cat's natural immune defenses from the inside out — supporting long-term resilience, not just short-term relief.

CALMS GUT INFLAMMATION
Reduces gut inflammation and digestive discomfort — helping restore the gut balance that calming neurotransmitter production depends on.
THE OUTCOMES
Not in a single dramatic moment — but in stages, the way real biology works.
Firmer stool. Less mess. Fewer 3am hairball wake-ups. The first thing cat parents notice — and usually the fastest to show up.
VISIBLE BY WEEK 2-4
Less anxious vocalizing. Less hiding. More play, more curiosity. The gut-mood pathway is real — and it works both ways.
VISIBLE BY WEEK 4-8
Shinier coat. Sleep regulates. Senior cats move easier. The compounding effects of a balanced gut over time.
VISIBLE BY MONTH 2-3
BEFORE
AFTER — 8 WEEKS LATERTHE MOMENT IT SHIFTS
For two years she'd been hiding under the couch. Vomiting after meals. Tired all the time. Eight weeks on Biopurr — yesterday she climbed onto my lap during a Zoom call and stayed there. Same cat. Different gut.
— Sarah M., mom to Pepper, 11, calico
RISK-FREE
No return shipping. No 'must be unopened' rules. No conditions. Use Biopurr however you want — if your cat doesn't visibly improve, we refund every cent.
READY?
Two drops a day. 90-day visible-improvement guarantee. Free shipping on subscriptions.
Real cat parents. Real changes. The Biopurr community shares their stories.
First firm poop in three months. Vet visits, expensive testing, no answers. Two weeks on Biopurr and the litter box stopped reeking. Mochi's coat went from coarse to silky within a month.

13-year-old playing like a kitten. Ferguson had basically retired from being a cat. Started Biopurr after my vet mentioned gut bacteria declines with age. By week six he was chasing the laser pointer again. He's HIMSELF again.
No more 3am hairball wake-ups. Pepper hocked up hairballs 2-3 times a week, always at 3am. Three weeks on Biopurr and we're down to maybe once a month. I'm sleeping through the night for the first time in two years.
My vet asked what I'd changed. Maple's annual checkup. Vet noticed her coat was glossier, teeth cleaner, healthy weight gain. "What are you doing differently?" I told her: Biopurr. She wrote it down.
She stopped hiding under the bed. Luna had been hiding ever since we moved apartments. Vet suggested anti-anxiety meds. Tried Biopurr first. Six weeks later she was sleeping at the foot of my bed.
I have my 12-year-old back. Olive had spent the last year vomiting after almost every meal. Two ultrasounds, three prescription diets, hundreds of dollars. Within two weeks on Biopurr the vomiting almost completely stopped.

Both my cats. Same week. Different cats. Theo (long-hair) and Birdie (shorthair) both started shedding less by week three. Theo's coat softer. Birdie's litter box went from "open the window" to "I forgot to scoop and didn't notice."
Forgot to scoop for three days. Cleo had IBS-ish symptoms forever. Loose stool, smell from the next room. After five weeks her poops are FORMED, the box doesn't reek, and she's bouncing off the walls like a kitten.
Her bald spot grew back. Honey had been over-grooming her belly raw for almost a year. Vet did skin scrapes, blood work, allergy panels — nothing. Two months on Biopurr and her belly fur is GROWING BACK.
Biscuit doesn't know she's on a supplement. Pickiest cat on earth. Biopurr is liquid and tasteless. Two drops on her wet food and she demolishes the bowl. Within a month her digestion was visibly better.
Three vet visits and $600 later. Pickle threw up almost daily for half a year. Food trials, ultrasounds, prescription diets. Vet started talking about steroids. Tried Biopurr first. Vomiting stopped at week three.

Got my cat back. That's it. Ranger had been declining for almost a year. Less playful, less affectionate. We thought it was just age. Six weeks in he started head-butting my hand for pets again. Like the old Ranger.
Adopted last month. Already a different cat. Bandit came from a kill shelter, scared of everything, hiding under furniture. Vet said his digestion was wrecked from stress and bad food. Three weeks on Biopurr and he's eating, exploring, and even started purring. I almost cried.

Cleaned his teeth without going to the vet. Mango's breath could clear a room. Annual cleanings are $400 and he hates them. Started Biopurr because the gut-mouth connection is real. Two months later his breath is normal and his gums look healthier. Saved the cleaning this year.
She's gaining weight. Finally. Suki has always been underweight no matter what we fed her. Vet ran every test, nothing wrong, just couldn't keep weight on. Six weeks on Biopurr and she's up a full pound. She actually looks healthy now.
Stopped scratching himself raw. Loki had constant itching, no fleas, vet thought allergies. Tried prescription food, no change. Read about gut-skin axis. Three weeks on Biopurr and the scratching stopped. The bald spot under his chin is filling in.
Two kittens. Two problems. Gone. Toast had loose stool from day one. Jam over-groomed her belly. Tried Biopurr after seeing it on Reddit. By week four both issues were gone. Two kittens, one bottle, problem solved.

She came back to herself after the move. Moved cross-country in March. Coco stopped eating, hid in closets, lost weight. Tried everything. Biopurr was a last resort. Two months in she's purring on my lap again. Like nothing ever happened.
My wife convinced me. I owe her one. I thought supplements were nonsense. My wife ordered Biopurr anyway. Two months later Goose's coat is shinier, his energy is back, and even our vet noticed. I was wrong. There. I said it.
First spring without antibiotics. Frida gets respiratory infections every spring. Two rounds of antibiotics annually, easy. Started Biopurr last fall. Spring came and went. No infection. Vet was surprised. I wasn't.
Constipation gone in 10 days. Norman strained at the litter box for weeks. Vet said add fiber, fiber didn't work, talked about laxatives. Tried Biopurr first. Ten days later he was going normally. We never went back to the vet.
She tolerates the dog now. We adopted a dog last year. Sushi hated everyone. Hissing, hiding, attacking the dog every chance. Tried calming treats, pheromone plug-ins, nothing worked. Biopurr was for her gut but her temper softened too. They sleep next to each other now.

Old man got his swagger back. Pixel had stopped using his cat tree. Stopped greeting me at the door. Just slept. Two months on Biopurr and he's climbing again. Greeting me at the door again. He's not young. But he's back.
No more vet visits for hairballs. Mittens was hocking up daily, vet wanted to do an endoscopy. $1,200. Tried Biopurr first because the price was reasonable and reviews were good. Hairballs stopped within three weeks. No endoscopy needed.
They both started purring on my lap again. Beau and Bella had become aloof. They'd eat, sleep, ignore me. Started Biopurr for their digestion. Three weeks in they both started seeking lap time again. I didn't realize how much I missed that until it came back.
Recovered from antibiotics in days. Marble had been on antibiotics for a UTI. Wrecked her digestion completely. Vet recommended a probiotic. Biopurr had the best ingredient list. Within a week her gut was back to normal. Keeping it as a permanent supplement now.

Her diabetes numbers got better. Pumpkin is diabetic. Vet said gut health affects glucose control. Started Biopurr alongside her insulin. Her glucose readings have been more stable for two months. Not a cure but a real improvement. Worth it.
Coat went from dull to magazine. Domino is a tuxedo cat but his black coat was dusty-looking and his white patches yellowing. Six weeks on Biopurr and his coat is glossy black-and-pure-white. Strangers stop me at the door. He's THAT shiny.
She's eating her food. All of it. Wren was the world's pickiest eater. Half her food in the bowl every day, then she'd cry for treats. Three weeks on Biopurr and she finishes her meals. The treats are now actual treats, not nutrition replacement.

Got 14-year-old Onyx eating again. Onyx had basically stopped eating after a kidney issue. Vet had us syringe-feeding him to keep him alive. Started Biopurr as a last-ditch. Two weeks later he was eating from the bowl. He's still old, but he's not dying.