★★★★★4.9 stars2,000+ reviews · 10,000+ happy dogs

It was never a food problem.

  • 18 human-grade ingredients in one tasty serving
  • Rebuilds the gut, not another food change
  • Vet formulated and made in the UK

No more binning half-eaten bags of “sensitive” kibble.

10,000+ happy dogs Save 40% + Free Gifts
Try it risk-free for 90 days
A healthier dog is a happier dog It was never a
Vet FormulatedReviewed by our in house vet. Every ingredient, every dose — published in full.
★★★★★

"Firm poops for the first time in months."

After endless food changes, three weeks in and they're firm and regular. I genuinely didn't think we'd get here.

D
Dev
✓ Verified buyer
★★★★★

"Off the antibiotic treadmill."

Every time the meds ran out it came back. Kooper's is the first thing that's held without them.

M
Michelle
✓ Verified buyer
★★★★★

"She's food-motivated again."

She's begging for her dinner and running around like she used to. Feels like I got my dog back.

B
Barry
✓ Verified buyer

Does this sound familiar?

Loose stools, every walk Three poops, each looser Rumbling, gassy tummy
Reacts to the tiniest thing Back on the antibiotics
Does this sound
70%
The root cause

of your dog’s immune system lives in the gut it all starts in

60%
The hidden cost

less nutrient absorption when the gut is disrupted — why poops turn big and smelly

65%
The real source

of chronic tummy trouble traces back to gut imbalance

If your dog’s stomach reacts to everything, this is for you.

The root of it

A sensitive stomach isn’t your dog’s personality — it’s an unbalanced gut

Bland diets and antibiotics manage the mess without rebuilding what’s broken — and chronic antibiotics can make it worse. Kooper’s brings back all three: prebiotics to feed good bacteria, probiotics to restore them, and postbiotics to help repair the gut lining, so food is digested properly again.

From chaos to firm, healthy poops

Over 10,000 dog owners have rebuilt their dog’s digestion with Kooper’s.

0%

firmer stools

0%

less gas & rumbling

0%

a settled, comfortable tummy

0%

would recommend Kooper’s

Start the inside out fix

One serving replaces

The prescription “sensitive” food£55/mo
The endless pumpkin£10/mo
The repeat antibiotics£30
The single-strain probiotic£15/mo
The root of it

A sensitive stomach isn’t your dog’s personality — it’s an unbalanced gut

Bland diets and antibiotics manage the mess without rebuilding what’s broken — and chronic antibiotics can make it worse. Kooper’s brings back all three: prebiotics to feed good bacteria, probiotics to restore them, and postbiotics to help repair the gut lining, so food is digested properly again.

0%

firmer stools

0%

less gas & rumbling

0%

a settled, comfortable tummy

0%

would recommend Kooper’s

From chaos to firm, healthy poops

Over 10,000 dog owners have rebuilt their dog’s digestion with Kooper’s.

Start the inside out fix

One serving replaces

The prescription “sensitive” food£55/mo
The endless pumpkin£10/mo
The repeat antibiotics£30
The single-strain probiotic£15/mo
Real transformations

Real dogs, real results

A few of the dogs whose tummies finally settled on Kooper's.

Before photo
Before
After photo
After
Bella 3 weeks on Kooper's

Liquid every walk → firm and regular

★★★★★
Before photo
Before
After photo
After
Rocky 6 weeks on Kooper's

Gassy and rumbling → settled tummy

★★★★★
Before photo
Before
After photo
After
Daisy 4 weeks on Kooper's

Off her food → begging for dinner

★★★★★
★★★★★ 4.9 · 1,240 reviews
Pre, Pro & Postbiotic Supplement

Human Grade Superfood For Dogs

A human-grade superfood topper built on gut health. 18 natural active ingredients, zero fillers, one scoop into any food — for every breed, every dog.

Select dog size

Under 11kg
11-34kg
Over 34kg
Choose your plan Free UK delivery
90-Day Money-Back Guarantee
Order today, receive in 1–3 days
Made in the UK Cancel anytime
90 Days
Risk-free trial

Not seeing results? Get a full refund within 90 days — no questions asked, and no need to send anything back.

Vet-
formulated
18 Human
Grade ingredients
Made in
the UK
Kooper's Promise
Kooper's Promise

Feed Kooper's daily for 90 days. If your dog isn't happier and healthier, we'll refund every penny — keep the product, no forms, no fuss.

The risk is ours, not yours.

★★★★★ 4.8 stars

Loved by dogs with happy tummies

Firm stoolsLess gasSettled tummyFussy-eater approved
★★★★★

He finally poops like a champ

After months of loose stools and every food under the sun, three weeks in and they're firm and regular. I didn't think we'd get here.

Hannah W.
★★★★★

Off the antibiotic merry-go-round

Every time the meds ran out the diarrhoea came back within a day. Kooper's is the first thing that's held without them.

Bradley O.
★★★★★

She's food-motivated again

I didn't realise how rough she'd felt until suddenly she was begging for her dinner and running around again.

Jaxon S.
Firm stools Regular again
Settled No more rumbling
Hungry again Loves dinner
Energy back Running again
Happy pup Comfortable

Reviews are cherry-picked for this angle and may feature owners who received free product or other incentives.

FAQ

The honest answers, before you ask.

Most dogs love the natural beef flavour and eat it straight away, mixed into their food. For fussier eaters, add a splash of warm water to turn it into a beef gravy. Tested on thousands of UK dogs, including the fussy ones.

Kooper's gets to work from the very first serving. Firmer stools and a settled tummy often come first, then fresher breath, less scratching and a glossier coat over two to four weeks. The real difference comes from feeding it daily.

Vet-formulated, 18 human-grade ingredients, every dose published. No proprietary blends, no hidden quantities. The real proof is the bowls: thousands of dogs fed Kooper's daily, rated 4.9 out of 5 by their owners.

90 days, money-back, keep the product. If you're not happy, neither are we.

Keep the pouch sealed in a cool, dry spot out of direct sunlight. No fridge needed. Reseal after each serving to keep it fresh.

Yes. Kooper's is a food-based daily topper that mixes into any diet, dry, wet or raw, and sits happily alongside most routines. If your dog is on medication, check with your vet first.