40 € off your test, ends in

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The Rudel test kit next to a dog, with a health score of 8 out of 10
Rated 5 out of 5 on Trustpilot4.7 on Trustpilot
•2,700+ reviews

Why is Frieda always eating so much grass?

Up to 90% of your dog's health is driven by what goes in the bowl. No 2 dogs are the same - and neither should be their nutrition. Stop guessing at your best friend’s health - One test can tell you if its right.

Gut health testLimited time offer
Menge:
1
137€97€
Inkl. MwSt.
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Free 1-2 day express deliveryOrdered before 16:00, delivered tomorrow
Results within 7 days
Easy to use sample kit, & pre-paid shipping to lab
Rated 4.7 by 2,700+ people | More than 65,000+ dogs tested

All tests are evaluated by our team of Vets. We work only with certified partner labs with accreditations and a proven track record.

Dr. Thomas KellerAdvising veterinarianDr. Thomas Keller
Without RudelYou change the food and judge the result from memory. Nothing was measured, so there is nothing to compare it with.
With RudelTwelve values, each with its reference range, and six recommendations that point back at the value they follow from.
Frieda and Katrin
Frieda and KatrinFound Frieda's food lacked the fibre she needed.
Balu and Jonas
Balu and JonasFound Balu's raw diet was too protein-heavy for his gut.
Lotte and Sabine
Lotte and SabineFound Lotte needed more red meats in her diet.
Otto and Julia
Otto and JuliaFound Otto needed a probiotic after his antibiotics.
Bruno and Markus
Bruno and MarkusFound Bruno's daily chews were too much protein for him.
Emil and Lena
Emil and LenaFound Emil's switch to fish was working on his retest.
ForbesThe Wall Street JournalThe New York Times

Change the food. Wait. Change it again. Or measure once.

All dog owners know the struggle. Finding the right nutrition is an endless cycle - and when you finally find something that works - you have to start all over again. It’s a time consuming, not to mention expensive and frustrating cycle - that hurts your pup’s health.

Find out how Rudel changes the game

There’s 5 signs that your dog’s nutrition is harming their health

Recognise one of these behaviours?

That could mean your pup’s nutrition is harming their health. Find our in just 7 questions with the Rudel health check.

Take the quizGet answers in under 2 min

We’ve helped 100K+ improve their pup’s nutrition

A dog eating grass outdoors

#1 Eating grass

This is the biggest sign that something is off. Many dog parents mistake this behaviour for illness. The truth is, most of the time, dogs will do this when they’re experiencing gut issues caused by an imbalance in their diet.

A dog scooting on the floor

#2 Scooting across the carpet

The bottom-drag across the rug, usually blamed on worms. More often it traces back to stool that has been soft for a while, which stops the glands down there emptying the way they normally would.

A dog scratching at a door

#3 Scratching the door

The scratch at the door at three in the morning. Urgency that keeps coming back is one of the clearest signs a gut is unsettled, and food is the first thing to rule in or out.

A dog lying on the floor

#4 A stomach you can hear from the sofa

Gurgling loud enough to hear from the sofa. Every dog does it now and then. When it becomes the soundtrack to every evening, the bowl is the first place worth looking.

A dog sitting on the floor

#5 Wind that empties the room

Funny once. Less funny nightly. Wind that never really clears up is one of the most common signs that something in the food is not being broken down properly on the way through.

How it works

Four steps, about two weeks, and the only one that takes any effort takes thirty seconds.

The Rudel test kit box, opened

Get your test kit

Six questions about your dog, then the kit arrives by post. A plain box, with nothing on the outside to say what is inside.

1
A sample tube and prepaid return parcel

Post one sample

Seal the tube, slide it into the prepaid envelope and drop it in any postbox. Return postage is already paid, so there is nothing to arrange.

2
A hand holding a phone showing the dog's gut bacteria report in the Rudel app

Get your report

Twelve values, each with its reference range, and six recommendations written by a vet. On your phone within 14 working days.

3

What we measure

The signs above are things you can see. These are the six things you can't, measured from one sample, each with a normal range beside it.

BiomarkerWhy it’s important
Gut flora balance~ The balance of bacteria

A dog's gut is full of bacteria, and most of them belong there. What matters is the mix, and the mix shifts with what's in the bowl. You get one number and the range it's supposed to sit in.

Inflammation (calprotectin)~ Signs of irritation

When the gut lining gets irritated it releases a protein into the stool. The more irritation, the more shows up. This is the value that separates "something is genuinely going on" from "nothing much".

Protein loss (alpha-1)~ Whether the gut wall is leaking

The gut wall is meant to keep protein inside the body. If it starts letting protein through, it ends up in the stool instead. It's slow and invisible from the outside, which is exactly why it's worth measuring rather than guessing.

Bile acids~ How fat is being handled

Bile breaks down fat, and certain gut bacteria change it on the way through. When that isn't happening it tends to show up here before anywhere else, which makes it a strong early hint that the balance is off.

Parasites and pathogens~ Unwanted visitors

Worms, giardia, and a few bacteria that have no business being there. Common even in dogs that look perfectly fine, and easy to miss without a test. This one comes back as a straight yes or no.

Food breakdown~ How much food is actually used

How much of dinner the body takes in, and how much passes straight through. If a lot is coming out undigested, the food itself is the first thing worth changing.

What vets love about Rudel

“How much of dinner the body takes in, and how much passes straight through. If a lot is coming out undigested, the food itself is the first thing worth changing.”

Dr. Thomas KellerAdvising veterinarianDr. Thomas Keller
Vets’ choice 2025

1,600+ German vets shared this with their patient’s without compensation.

Inside the report

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Max the dog

“Max has had stomach issues for years. I always thought it was because he’s a fat fuck, but the Rudel test showed me it was actually his nutrition. Their team helped me find a mix that works for him, and he’s back to his old self!”

Thomas from Berlin
Max’s parentThomas from Berlin
Max’s health report
Top 3 issuesMax’s gut is currently only breaking down 50% of the food due to inflamati...
InflammationGut floraBreakdown
Needs urgent attention
Our recommendation
Advising veterinarianDr. Thomas Keller
Dr. Thomas Keller

“Max has had stomach issues for years. I always thought it was because he’s a fat fuck, but the Rudel test showed me it was actually his nutrition. Their team helped me find a mix that works for him, and he’s back to his old self!”

Health score2/10
Bad
Verified customer
Max the dog

“Max has had stomach issues for years. I always thought it was because he’s a fat fuck, but the Rudel test showed me it was actually his nutrition. Their team helped me find a mix that works for him, and he’s back to his old self!”

Thomas from Berlin
Max’s parentThomas from Berlin
Max’s health report
Top 3 issuesMax’s gut is currently only breaking down 50% of the food due to inflamati...
InflammationGut floraBreakdown
Needs urgent attention
Our recommendation
Advising veterinarianDr. Thomas Keller
Dr. Thomas Keller

“Max has had stomach issues for years. I always thought it was because he’s a fat fuck, but the Rudel test showed me it was actually his nutrition. Their team helped me find a mix that works for him, and he’s back to his old self!”

Health score2/10
Bad
Verified customer
Max the dog

“Max has had stomach issues for years. I always thought it was because he’s a fat fuck, but the Rudel test showed me it was actually his nutrition. Their team helped me find a mix that works for him, and he’s back to his old self!”

Thomas from Berlin
Max’s parentThomas from Berlin
Max’s health report
Top 3 issuesMax’s gut is currently only breaking down 50% of the food due to inflamati...
InflammationGut floraBreakdown
Needs urgent attention
Our recommendation
Advising veterinarianDr. Thomas Keller
Dr. Thomas Keller

“Max has had stomach issues for years. I always thought it was because he’s a fat fuck, but the Rudel test showed me it was actually his nutrition. Their team helped me find a mix that works for him, and he’s back to his old self!”

Health score2/10
Bad
Verified customer
Max the dog

“Max has had stomach issues for years. I always thought it was because he’s a fat fuck, but the Rudel test showed me it was actually his nutrition. Their team helped me find a mix that works for him, and he’s back to his old self!”

Thomas from Berlin
Max’s parentThomas from Berlin
Max’s health report
Top 3 issuesMax’s gut is currently only breaking down 50% of the food due to inflamati...
InflammationGut floraBreakdown
Needs urgent attention
Our recommendation
Advising veterinarianDr. Thomas Keller
Dr. Thomas Keller

“Max has had stomach issues for years. I always thought it was because he’s a fat fuck, but the Rudel test showed me it was actually his nutrition. Their team helped me find a mix that works for him, and he’s back to his old self!”

Health score2/10
Bad
Verified customer

Rated by dog owners at every step, from the kit arriving to the report landing.

Rated by the people who had to take the sample, read the report, and change what goes in the bowl.

Every Rudel report comes from an accredited laboratory and is written up by a vet. That is why owners do not just get numbers back. They get six things they can actually do about them.

Overall rating
4.8/5
Sample was easy to collect
4.7/5
Report was clear and worth acting on
4.6/5
The Rudel partner laboratory
Dr. WernerDr. AndreaDr. Adrian
Dr. AndreaRuns the lab and oversees every sample
Dr. WernerWrites the recommendations in your report
Dr. Adrian Reads the values, flags what's off

Every report

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Inside the BOC Sciences laboratory
BOC Sciences, BerlinAccredited to ISO 17025, specialised in Canine sample testing
Our partner laboratory

How Rudel. compares to others

ExcellentRated 5 out of 5 starsTrustpilot
Rudel.Others
Values you get back12, each with its reference rangeOften a single score
Laboratory named, with a register entryYesNo
Accredited to ISO 17025YesNo
Recom­mendations signed by a named vetYesOften software-generated
Full value list published before you buyYesRarely
A real sample report before you buyYesRarely
Report laid out to take to your own vetYesNo
Free replacement if the sample isn't usableYesNo
Money back if the report says nothing concreteYesNo
What you do with the resultSix recom­mendations for the bowlA basket of supplements
Time to an actual answer14 daysSix weeks per food trial
Cost€97€99–130
The Rudel test kit next to a dog, with a health score of 8 out of 10
Rated 5 out of 5 on Trustpilot4.7 on Trustpilot
•2,700+ reviews

Every report

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Limited time offerMenge:
1
137€97€
Inkl. MwSt.
Free 1-2 day express delivery
Easy to use sample kit, & pre-paid shipping to lab
Results within 7 days
Ordered before 16:00, delivered tomorrow
95%Often a single score
95%Often a single score
95%Often a single score
Parasites and pathogens

12, each with its reference range

Parasites and pathogens

Placeholder answer for question two. The final copy will go here, in one or two short lines.

Parasites and pathogens

Placeholder answer for question three. The final copy will go here, in one or two short lines.

Parasites and pathogens

Placeholder answer for question four. The final copy will go here, in one or two short lines.

Parasites and pathogens

Placeholder answer for question five. The final copy will go here, in one or two short lines.