The research behind every scoop.
Every dose in Snug Vitals comes from feline research. Read the studies yourself, strain by strain and ingredient by ingredient.
10B
LIVE BACTERIA PER SCOOP
2
PREBIOTICS, RESEARCH DOSED
70+
FELINE STUDIES LINKED
THE SCOOP
Six ingredients, one scoop.
Three live bacteria strains make up the 10 billion. Two prebiotics fuel them so they multiply and stay. A natural chicken liver flavor gets every scoop eaten. Each one has its own card below, with the studies to read.
1
L. plantarum
Helps calm your cat's gut, so loose stools and accidents outside the box happen less.
LIVE BACTERIA5 billion CFU
50% of the three strains
2
L. casei
Helps keep your cat's gut balanced, so the good bacteria stay in charge.
LIVE BACTERIA2.5 billion CFU
25% of the three strains
3
B. subtilis
Helps your cat have firmer, healthier stools and a stronger gut defense.
LIVE BACTERIA2.5 billion CFU
25% of the three strains
4
GOS prebiotic
Fuels the good bacteria so they stay and keep your cat's tummy settled.
FUELS THEM500 mg
Exact dosage used in feline studies
5
Dried beet pulp
Gentle fiber that fuels the good bacteria for firm, regular stools.
FUELS THEM200 mg
Exact dosage used in feline studies
6
Hydrolyzed chicken liver
A chicken liver flavor cats choose first, so your cat actually eats every scoop.
THE FLAVORIn every scoop
THE STRAIN DOSSIER
The live bacteria.
Three named strains, each with a job. Together they add up to 10 billion live bacteria in every scoop.
Lactobacillus plantarum
L. plantarum
5 BILLION CFU
WHAT IT DOES FOR YOUR CAT
Helps calm your cat's gut, so loose stools and accidents outside the box happen less.
IN EVERY SCOOP
5 billion CFU, half of the 10 billion.
WHAT THE STUDIES FOUND
+30% gut defense.
In cats, it raised the gut immune protein sIgA by 30.1% and cut stool odor compounds by 67.3%.
Studies including L. plantarum 8 studies ▾
2026
A heat-treated L. plantarum product increased Bifidobacterium, lowered cholesterol and triglycerides, and cut stool odor compounds in cats.
Veterinary Sciences
2024
L. plantarum raised the immune protein sIgA in cat stool by 30.1%, increased Bifidobacteria, and cut a stool odor compound (3-methylindole) by 67.3%.
Microorganisms
2024
B. lactis plus L. plantarum improved the gut barrier, raised IgA by 25% and increased helpful Lactobacillus in cats.
Antioxidants (Basel)
2024
L. plantarum lowered blood fats and an inflammation marker (IL-6) in healthy cats.
Microorganisms
2026
An L. plantarum strain from cat milk survived stomach acid and bile very well and raised antioxidant defenses in mice.
Front Microbiol
2025
L. plantarum strains from cat milk survived acid and bile, stuck well to surfaces, were safe, and fought germs.
Animals (Basel)
2024
L. plantarum from cat feces lowered weight gain, blood fat and inflammation in mice on a high-fat diet.
Front Microbiol
2021
L. plantarum from healthy cats was picked as one of the most promising probiotic strains in lab tests.
Pathogens
Lactobacillus casei
L. casei
2.5 BILLION CFU
WHAT IT DOES FOR YOUR CAT
Helps keep your cat's gut balanced, so the good bacteria stay in charge.
IN EVERY SCOOP
2.5 billion CFU, a quarter of the 10 billion.
WHAT THE STUDIES FOUND
More good bacteria.
In cats, it grew the helpful lactic acid bacteria in stool.
Studies including L. casei 2 studies ▾
2024
A probiotic mix that included L. casei shifted the bacteria in cats' mouths toward helpful species and away from harmful ones.
Veterinary Sciences
2020
Cats fed probiotics including L. casei, with or without FOS, had more helpful lactic acid bacteria in their stool.
Int J Microbiol
Bacillus subtilis
B. subtilis
2.5 BILLION CFU
WHAT IT DOES FOR YOUR CAT
Helps your cat have firmer, healthier stools and a stronger gut defense.
IN EVERY SCOOP
2.5 billion CFU, a quarter of the 10 billion.
WHAT THE STUDIES FOUND
Better stools. Stronger defense.
In cats, it improved stool scores and raised the gut defenders IgA and IgM.
Studies including B. subtilis 2 studies ▾
2026
Cats given a Bacillus mix that included B. subtilis had a more varied gut microbiome, more good gut bacteria and fewer opportunistic germs.
Biology (Basel)
2025
Cats given B. subtilis or B. licheniformis had better stool scores, higher immune markers (IgA and IgM) and a lower inflammation marker (TNF-alpha).
Animals (Basel)
Read the 10 billion CFU studies
The feline studies behind the dose of live bacteria in every scoop.
Studies at 10 billion CFU a day in cats 2 studies ▾
2025
Cats given 10 billion live Bifidobacterium a day had more of that bacteria in their gut over time, and the dose was safe and well tolerated.
J Anim Sci
2013
Cats fed 10 billion CFU a day of a Bifidobacterium with GOS had far more bifidobacteria and lower stool ammonia.
Am J Vet Res
WHAT FUELS THEM
The two prebiotics.
Live bacteria only help if they stay. These two ingredients fuel them from the front of the gut to the far end.
THE PREBIOTIC
GOS
500 MG
WHAT IT DOES FOR YOUR CAT
Fuels the good bacteria so they stay and keep your cat's tummy settled.
WHAT THE STUDIES FOUND
It fuels the good bacteria.
In cats, GOS grew good bacteria and boosted the gut's helpful acids.
Studies including GOS 5 studies ▾
2025
Cats given 0.5 g of GOS a day had more Bifidobacteriaceae (helpful gut bacteria) and more acetic, propionic and butyric acids in their stool, and lower blood phenyl sulfate (a gut-made waste compound).
Biosci Microbiota Food Health
2024
In cats, the helpful bacteria Lachnospiraceae and Bifidobacterium grew with GOS.
Res Vet Sci
2013
Cats fed GOS plus a Bifidobacterium probiotic had far more bifidobacteria in their stool and lower stool ammonia.
Am J Vet Res
2011
Cats fed GOS, scFOS, or both had more Bifidobacterium in their stool.
J Anim Sci
2014
In cat stool cultures, GOS lowered ammonia (a smelly waste product) by 9% and lowered pH.
J Anim Sci
THE FIBER
Dried beet pulp
200 MG
WHAT IT DOES FOR YOUR CAT
Gentle fiber that fuels the good bacteria for firm, regular stools.
WHAT THE STUDIES FOUND
The fiber cats ferment best.
In cats, it was the most fermentable fiber tested, with the most helpful stool acids.
READ THE STUDIES
Studies including beet pulp 9 studies ▾
2025
Kittens fed a fiber blend with dried beet pulp had better stool scores, lower stool pH and more short-chain fatty acids, and grew normally.
J Anim Sci
2022
Cats fed 3% beet pulp had more stool acetate, propionate and total short-chain fatty acids than cats fed no fiber.
Arch Anim Nutr
2021
Cats fed beet pulp digested the most dietary fiber and had the highest stool short-chain fatty acids.
Front Vet Sci
2020
Cats fed a beet pulp diet digested more dry matter, organic matter, energy and fiber than cats fed other fiber diets.
J Anim Physiol Anim Nutr (Berl)
2019
Older cats fed beet pulp had the highest stool short-chain fatty acids and the highest fiber digestibility.
J Anim Sci
2012
Beet pulp was the most fermentable fiber, giving cats more stool acetate, propionate and lactate and lower stool pH.
J Anim Sci
1995
Cat gut bacteria fermented beet pulp into short-chain fatty acids, making more total SCFA and acetate than the bacteria of other species tested.
J Anim Sci
1995
A beet pulp diet was among those with the highest fiber digestibility in cats, with fermentation products that may help keep the gut healthy.
J Anim Sci
1995
Cats fed beet pulp had stool bacteria that tended to break down fiber a little better and make more propionate.
J Anim Sci
THE FLAVOR
Hydrolyzed chicken liver.
IN EVERY SCOOP
WHAT IT DOES FOR YOUR CAT
A chicken liver flavor cats choose first, so your cat actually eats every scoop.
WHAT THE STUDIES FOUND
Cats choose it.
In cats, food with it was preferred and raised the gut's helpful acids.
Studies including hydrolyzed chicken liver 2 studies ▾
2025
Cats preferred diets made with hydrolyzed chicken liver, and these diets raised stool short-chain fatty acids.
J Anim Sci
2024
A chicken liver hydrolysate attractant got the highest intake and was chosen first by cats.
J Agric Food Chem
THE FORMULA
Made for cats only.
Made in the USA
Made when you order, in the USA.
Cat-only formula
Not a dog formula with a cat label.
Third-party tested
Every strain and amount is on the label.
THE WIDER RESEARCH
More feline research behind the approach.
Our ingredients have their own studies above. These are more studies in cats, showing that probiotics and prebiotics work in the cat gut.
Probiotics in catsStudies on live bacteria in the cat gut
26 studies ▾
Probiotics in cats
Studies on live bacteria in the cat gut
2026
Heat-killed L. acidophilus gave healthy cats and cats with diarrhea a healthier gut bacteria balance.
Journal of Animal Science
2026
In cats with E. coli diarrhea, a mix of five cat-derived probiotic strains improved stool scores and lowered inflammation markers.
NPJ Biofilms Microbiomes
2026
Cats with mild diarrhea given E. faecalis had lower inflammation markers and a more diverse gut microbiota after 42 days.
Animals (Basel)
2026
After antibiotics, cats given an Enterococcus probiotic got their gut bacteria balance back to normal faster than cats given placebo.
J Feline Med Surg
2025
In cats with kidney disease, 8 weeks of a Lactobacillus mix kept or lowered kidney blood markers in most cats and increased gut microbe diversity.
Frontiers in Veterinary Science
2025
Cats given heat-treated Bifidobacterium had a better fur condition, a stronger gut barrier, more immune protein (IgG) and more good gut bacteria.
Front Microbiol
2025
A supplement with prebiotics, a probiotic and postbiotics was well tolerated in cats, with lower blood sugar and cholesterol and more immune T and B cells.
Open Vet J
2025
Cats fed yogurt with a heat-inactivated Pediococcus had lower inflammation markers (TNF-α, IL-6), more gut IgA and more Bifidobacterium.
Animals (Basel)
2025
Kittens given a complex probiotic had less constipation and more Bifidobacterium animalis than kittens not given it.
Microorganisms
2025
Kittens given a complex probiotic showed gut chemical changes that point to better gut health and less gut inflammation.
Animals (Basel)
2024
In cats with kidney disease, creatinine went down or stayed the same during 8 weeks of Lactobacillus treats, and quality of life improved.
Animals (Basel)
2024
L. reuteri gave healthy cats better stool quality, more Lactobacilli and fewer coliform bacteria.
Veterinary Sciences
2023
Pet cats fed a Bacillus probiotic had fewer soft stools and less diarrhea, lower inflammation markers and more short-chain fatty acids in stool.
Anim Microbiome
2023
In healthy cats, a probiotic mix helped good bacteria settle in, raised short-chain fatty acids and antioxidants, and lowered gut inflammation markers.
Metabolites
2022
Cats fed a fiber, prebiotic and probiotic blend had more gut bacteria diversity than cats fed resistant starch.
Anim Microbiome
2022
Six of eight cats with chronic diarrhea got better within 7 days on a Bacillus licheniformis product, and helpful gut bacteria went up.
Animals (Basel)
2022
Shelter kittens given an E. hirae probiotic were about 3.4 times less likely to get diarrhea than kittens given placebo.
Front Vet Sci
2019
L. acidophilus made cat stool less wet, moved stool scores closer to ideal, and raised Lactobacilli in stool while lowering coliforms.
Veterinary Record Open
2019
In kittens given a harmful E. coli, adding the helpful gut bacterium Enterococcus hirae reduced the damage to gut function and water loss.
Vet Microbiol
2017
Cats on an antibiotic that were given an Enterococcus probiotic had lower diarrhea scores than cats given placebo.
Topics in Companion Animal Medicine
2017
Cats on an antibiotic that also got a synbiotic ate better and vomited less, and all finished treatment versus half on placebo.
J Vet Intern Med
2017
In healthy cats, oral probiotic bacteria showed up in the airways and gut after 4 weeks.
Front Microbiol
2011
Cats given a multi-species synbiotic had more of the probiotic bacteria in their stool, with no gut side effects.
FEMS Microbiol Ecol
2011
Far fewer shelter cats on an Enterococcus probiotic had diarrhea for 2 or more days: 7.4% versus 20.7% on placebo.
Journal of Veterinary Internal Medicine
2009
Cats given an Enterococcus probiotic kept a steady, varied gut microbiome while placebo cats lost diversity.
Journal of Feline Medicine and Surgery
2006
L. acidophilus survived the cat gut, raised beneficial Lactobacillus in stool and lowered Clostridium and E. faecalis.
American Journal of Veterinary Research
Prebiotics and fiber in catsStudies on what fuels the good bacteria
19 studies ▾
Prebiotics and fiber in cats
Studies on what fuels the good bacteria
2026
Cats and dogs given a prebiotic-postbiotic chew had better stools by day 7, and by day 28 cats had 63% less gas and 54% less vomiting.
Front Vet Sci
2025
Kittens fed a supplement with oligosaccharides made more antibodies to the Chlamydia vaccine and showed gut bacteria changes.
Animals (Basel)
2025
Cats fed yeast cell wall had less gut inflammation, a stronger gut barrier, more helpful gut bacteria and more short-chain fatty acids.
Food Sci Nutr
2025
Cats fed beta-glucan in goat's milk had higher immune protein (SIgA) and more Bacteroides gut bacteria.
Can J Vet Res
2024
Cats given inulin had more stool sIgA (an immune protein) and more Collinsella, a gut bacterium.
Res Vet Sci
2022
Cats with kidney disease fed a betaine and prebiotic food gained body mass, and healthy cats had lower blood levels of a gut-made toxin.
PLoS One
2021
A yeast cell wall product raised stool lactic acid and lowered Clostridium perfringens in cats without lowering protein digestibility.
BMC Vet Res
2020
After cats were fed fiber, many uremic toxins in stool fell, pointing to a gut-kidney link.
Metabolites
2020
In cats with kidney disease, scFOS lowered two phenolic uremic toxins and raised a gut bacteria group that was low in these cats.
PLoS One
2020
Cats given 1-kestose tended to have more Bifidobacterium, more butyrate-making Megasphaera and more butyric acid.
J Vet Med Sci
2020
The prebiotic XOS changed the gut bacteria of healthy cats, and the low dose raised Lactobacillus.
Molecules
2018
Yeast cell wall in the diet raised Bifidobacterium and Lactobacillus and lowered Clostridium perfringens and E. coli in cat stool.
Journal of Animal Physiology and Animal Nutrition
2017
Cats accepted a FOS and inulin supplement well with no side effects such as diarrhea, and had lower Gammaproteobacteria in stool.
PeerJ
2014
In senior cats, fructans lowered some smelly stool compounds (indole, tyramine, histamine) and E. coli.
J Anim Sci
2011
Cats that ate FOS had stool bacteria that made more acetate and total short-chain fatty acids from FOS.
J Anim Sci
2010
Cats fed FOS had more Bifidobacterium and less E. coli in their stool.
J Anim Sci
2010
Oligofructose and inulin gave cats more propionate and less use of amino acids for energy, and urinary nitrogen waste was lower.
Br J Nutr
2001
Oligofructose was easy for cats to ferment, with more stool short-chain fatty acids and lower stool pH at 3%.
J Anim Physiol Anim Nutr (Berl)
1998
Cats fed FOS tended to have more lactobacilli and fewer C. perfringens and E. coli in their stool.
Am J Vet Res
THE DIFFERENCE
Our dose, next to the shelf.
Live bacteria per day
Snug Vitals10 billion
Amazon and Chewy brandsabout 100 million
100 times more live bacteria. 10 billion is the dose shown to work in cats.
Prebiotic in the scoop
Snug Vitals500 mg GOS
Most other brandsNone, or a cheap one
The exact prebiotic and dose used in the feline studies.
HOW WE FORMULATE
Three rules we formulate by.
01
Research dose, not a guess
Every dose comes from feline research. 10 billion live bacteria, 100 times the brands on Amazon and Chewy.
02
The prebiotic from the feline studies
GOS at 500 mg, the exact prebiotic and dose used in the research, so the good bacteria multiply and stay.
03
Cat-only, made in the USA
A cat-only formula, made in the USA and third-party tested. Every strain and amount is on the label.