Prevent resistance – perform worm testing before deworming

Welcome to Worm&Co 

Only deworm when truly necessary

Worm&Co is the leading company specialized in worm analysis for animals. With us, your animal’s health always comes first. That is why all examinations are carried out by specialists from the veterinary parasitology laboratory. Our knowledgeable and enthusiastic team is happy to guide you towards optimal worm management. Because your animal’s health always deserves the very best.

Easily order the worm analysis kit online. If a worm infection is detected, we will immediately provide appropriate advice and a customized treatment plan.

Many animal owners already rely on our experienced team
Among our clients: Anky van Grunsven, Rien van der Schaft, Stoeterij Sterrehof, Hester Klompmaker, and Stal van Silfhout. You can find more client experiences at the bottom of this page. Any questions? Feel free to contact us — our team is happy to help.

Conclusion: only deworm when worm testing shows it is truly necessary.

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Satisfied Clients

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Dedicated Team

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Reviews ⭐⭐⭐⭐⭐

Why Worm&Co?

Results within 24 hours

After we receive the manure or fecal sample, you will receive the results along with personalized advice in your inbox within 24 hours.

Parasitology Laboratory

The worm tests are carried out by the parasitology laboratory, ensuring high quality and reliability.

Worm Control Advice

At Worm&Co, you not only receive the results of the worm test but also always get personalized advice. This ensures your animal’s health comes first and prevents unnecessary deworming.

Worm Testing Reminder

You don’t have to worry about forgetting to do worm testing, because with us you will always receive a reminder. That way, you can relax in the meantime.

Year-round Support

Our enthusiastic team is ready to assist you 5 days a week. Whether you’re looking for advice, information, or just want to consult — we’re happy to help!

Together Against Resistance

By only deworming when worm testing shows it is necessary, we slow down worm resistance and prevent unnecessarily exposing your animal to aggressive treatments.

Send copy of result

In your account, you have the option to send a copy of the result to anyone you wish to keep informed about your animal’s health. You can also send a copy directly to your veterinarian.

Digital file with logbook

Worm&Co uses a transparent online record system. You build a digital file for your animal(s). In this file, you can always view or print test results, advice, and invoices. You can also keep a logbook about your animal’s health.

What do our clients say?

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What a great company! We spent a long time searching with the vet for a solution. Eventually, the vet referred us to Worm&Co. Together with their team and my veterinarian, I have regained control over the infection. Super grateful for this dedicated team! Truly recommended!

Van Trier

July 2025
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What a great company! We spent a long time searching with the vet for a solution. Eventually, the vet referred us to Worm&Co. Together with their team and my veterinarian, I have regained control over the infection. Super grateful for this dedicated team! Truly recommended!

Van Trier

July 2025
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Just last night at the riding school I was talking about your excellent service.

That definitely deserves to be said out loud. :-)

Greetje van Wetering

March 2025
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We started working with Worm&Co for our boarding stable six months ago. We house 34 horses and had been searching for the right solution instead of just standard deworming. Worm&Co sends everything neatly in a package, with clear instructions. The results are clearly readable in your own account on their website. But above all, the communication is excellent. Even if you email in the evening, you get an answer in no time. Simply great!!

Stal Dapper

March 2024
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I’m very satisfied and extremely grateful for all the help you get and the time they take for you.
Truly a recommendation.

 

Mady Lavita

October 2025
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A manure sample got lost at PostNL, but Worm&Co kindly sent me a new one. Excellent service!

Frances Jansen

March 2025
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Had very pleasant contact, and the test results were completely different from those of the vet.

 

Marissa

July 2025
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Professional, personal, clear, well-structured, accessible, and scientifically based approach.
Always great communication — professional, personal, and easy to reach. Always willing to give advice. A very pleasant way of working. Fast, clear results with straightforward advice.
I’ve been a customer for years and have nothing but praise!

 

Ilse Boekhoven - Brouwer

July 2025
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Super fast and pleasant communication and advice! As an overprotective horse mom, I’m really very happy with it!!

Mendy Van Den Berg

March 2024
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Super convenient by post, always quick, easy to reach and great service! Also a good policy: no blind deworming when it’s not necessary, but still an overall annual treatment. Very satisfied!

Anouk

March 2025
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Professional, personal, clear, well-structured, accessible, and a scientifically based approach.

Always very pleasant contact. Professional, personal and approachable. Always willing to give advice. A great way of working. Fast, clear results with clear recommendations.
I have been a customer for years and have nothing but praise!

lse Boekhoven - Brouwer

july 2025
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I am very happy with the help from Worm&Co… And also very happy with the help from Janneke.

Cathy Peek

May 2025
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Neat, fast and affordable service. There is a helpful team ready to assist, and they provide clear information.

Maaike Bruijn

February 2025
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Quick check and also aftercare. If you have a question, you get a quick answer. Just absolutely great!

Saskia van Bijsterveld

December 2025
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First of all, thank you so much for the great service over the past year! Happy with you!

 

Anouck Boogaard

December 2022
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Thank you Worm&Co… what amazing service!!! Probably due to my own carelessness I lost an entire yearly package, and they are sending me a new one completely free of charge. In addition, we have been having our manure tested at Worm&Co for quite some time now, and we are extremely satisfied. Very pleasant, easy to reach and always thinking along with us.

Els Middelhoek

February 2025
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Top! Friendly, very helpful, and they respond very quickly. I can completely rely on them. Truly recommended.
Vivienne

Vivienne van Aalst

February 2025
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We have been working with Worm&Co for years. It’s great that reminders are sent and that we receive tailored advice within 24 hours after sending in a sample. We wouldn’t want it any other way!

Rachel Paardenhotel Putten

March 2025
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I recommend everyone to have the fecal testing done through Worm&Co. It’s so nice to be able to discuss your horse’s care regarding deworming.

Bo van Lattum

February 2024
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They reply to emails almost immediately with advice — even on an evening during the weekend. Great service and fast shipping.

De Graaf

February 2024
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I am very satisfied with Worm&Co. The delivery of products runs very smoothly. You also receive a clear report quickly, along with advice following a manure test. Additionally, the annual health package is always a treat for both horse and rider. A happy customer!

Suzan Treur de Vries

January 2025
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They reply to emails almost immediately with advice — even on a weekend evening. Excellent service and fast shipping.

Emma Buurman

September 2018
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Good and smooth communication and solution.
Expert advice.

Jolanda Kicken

juni 2025
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Lovely people who always support you with advice and tips. They really think along with you and have a lot of knowledge and experience. Top team!!!

Love, Ime, Simone and Tjalling 💙

Simone Duchenne

june 2024
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We are very satisfied with the service from Worm&Co! By regularly conducting manure tests, we know exactly which deworming treatment is necessary in case of an infection and need to deworm much less. Besides saving us money, it is much healthier for the horses. The Worm&Co team is also very involved and always ready to give advice. I highly recommend Worm&Co!

Anky van Grunsven

September 2018
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Fast service, easy and clear information. Questions are answered promptly.

 

Cobie Kruger

January 2024
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I recommend everyone to have their manure testing done through Worm&Co. It’s so nice to be able to discuss and get advice about your horse’s deworming care.

Adriana

December 2023
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Great how smoothly everything went, many thanks.

 

 

Heike Markman

February 2023
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Effective and practical.

 

Claudine Pol

December 2023
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Thanks again for the helpful advice and for the great guidance throughout.

 

 

Madelief

February 2022
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Wonderful! This makes me happy. Thank you all!

 

 

 

Diana Jennen

February 2023
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What an excellent service this is. Quick, clear, detailed, and transparent. Questions are answered promptly and clearly. Very professional :D

 

 

 

Lara Giling

February 2023
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Thank you for your great service and advice!

 

 

Maud van der Meulen

December 2022
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Good and fast advice. Deworming treatment sent quickly. Easy to order.

 

 

Jory Kolenbrander

February 2023
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Thank you for your quick response! I’m relieved.
I also want to compliment you — everything runs smoothly and in an organized way. Very happy with it. Thank you!

 

 

Monique de Bruin

December 2022
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Thank you for the great service!!

 

 

Danielle Drenth

November 2022
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Great! Then it’s all sorted. Thanks for the service and the quick email response!!

 

 

Chanice Castricum

August 2022
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Thank you for this great service. I didn’t know about Worm&Co before, but whenever I hear someone talk about a manure test, I’ll definitely refer them to you.

 

 

Rita Schutte

August 2022
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I’ve always been very satisfied with the fast service and pleasant communication from Worm&Co. Recently, I unfortunately had to mention that my horse isn’t doing well and her future is still uncertain. The next day, I immediately received a card and some tasty treats for my horse in the mail. So sweet and thoughtful! A company that truly cares and thinks along with you — wonderful! :)

 

 

Saskia de Bruyn

December 2021
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Worm&Co is excellent! This company stands for quality and service. I’ve been using Worm&Co’s services for years — always great advice and very customer-friendly!

 

 

 

Sanne Kersten

December 2021
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Excellent service! Very knowledgeable and truly think along with you. They don’t just push products. I discussed the results, pasture management, and my horse’s health with them. This way, we came to a tailored advice and a plan for the future. Worm&Co stands for an individual approach (also within a herd context). You do need to get in touch yourself, of course. I’m really happy with them!

 

 

Myrna Groenink-Mastail 

December 2021
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Ah, that’s great service!

 

 

Marloes van Zeilen

February 2022
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Good advice, quick answers to questions, and it gives me peace of mind knowing my horses are under worm control.

Puck Zuylen

September 2021
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I received the package safely, and what a lovely surprise!
Thank you so much for the nice extras.
You are AWESOME!

 

 

Sonja Bearnaart

December 2022
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A wonderful company, easy to use. Quick responses and results! And such a thoughtful card when Cassie passed away — thank you for your care! I’ll definitely come back with my next horse!

Marieke Bos-Verkuil

December 2021
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Quick response, advice, and test results. Always friendly in communication.

 

Regina Verstegen

November 2021
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The annual Health Package always feels like a gift, with great little details and useful items (like a horseshoe charm, hoof pick, etc.). They answer questions very quickly, and the manure test results arrive within a few days. Fantastic team!

Yvette van den Biggelaar

October 2021
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I received the package safely, and what a lovely surprise!
Thank you so much for the nice extras.
You are AWESOME!

 

 

Sonja Bearnaart

December 2022
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Great! Very friendly and helpful, they respond super quickly. I can fully rely on them — truly recommended.

 

Vivienne van Aalst

September 2021
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Simple, fast and effective — we wouldn’t want it any other way.

 

Bas Gill

April 2021
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Top service and top team!

 

 

Jan vandenberghe

March 2021
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Works super well and fast, 5 stars!

 

 

Rodney van het Klooster

March 2021
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Super nice company, excellent service! Quick results and advice.

 

Sanne vd Born

March 2021
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Super easy and very fast results. You order a manure test, they send it to you, you send back the sample, and within 1–2 days you already have the results. Perfect!

 

Wendy Gijsbers

April 2021
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Very satisfied with the service, speed, and helpfulness of the staff. The instructions for collecting the manure samples are clearly explained and easy to follow. Took the samples yesterday and mailed them — less than 24 hours later, the results were already in my inbox. Thank you, Worm&Co, a fine example of craftsmanship!

 

Marjan Urkens

March 2021
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Good service and always good advice.

J. Verkleij

October 2021
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Great company with good service!

 

 

Nina Smits

March 2021
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Great company! Excellent professional service and always ready to help.

 

 

Lysanne Stoffer

March 2021
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Top service from Worm&Co. Always a quick response on the manure test and always a polite reply to your email or app message. Thank you for the stable sign, Worm&Co!

 

 

Christe Eekers

March 2021
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Received my Health Package last week — fast delivery and a beautiful package! Detailed information and extra items included. Time to have the manure tested soon!

 

Thessa Bresser

October 2020
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Excellent service. Very easy to do. Good explanation. And the results within 1 to 2 days. Great! Luckily, all my horses were clear.

 

 

 

Stephanie Elise

September 2020
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Super easy and very fast results. You order a manure test, they send it to you, you send back the sample, and within 1–2 days you already have the results. Perfect!

 

Wendy Gijsbers

April 2021
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Nothing but good words about Worm&Co’s service. Very personal, always there for you, and every question is answered neatly and thoroughly.

 

 

 

 

Frederique de Kousemaeker

June 2020
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Very good experience! Always great advice and they really think along with you.

 

 

 

 

Femke van Herk

May 2020
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Manure testing is super easy with Worm&Co. You receive the results very quickly in your horse’s online file. Very happy with it!

 

 

 

 

Angelique Hadderingh

May 2020
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Very nice company, great way of doing manure tests and it’s super easy. You can order a worm test kit online and send it back. Within a day I already had the results and advice.

 

 

 

 

Noëlle Sijbrandij

April 2020
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We’re big fans of Worm&Co — everything arranged in one go and building a great record! The products arrive quickly and the results come in very fast.

 

 

 

Lucinda van Hal

January 2019
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Very satisfied with Worm&Co. The results with accompanying advice arrive very quickly, and they provide excellent service. They’re also very easy and quick to reach for any questions. The reminder emails for the next manure test are also really helpful.

 

 

 

 

Nadine Pool

January 2019
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Had a wonderful experience with Worm&Co! I didn’t know at first that it was so easy and fast! Did the manure test late in the evening, sent it the next morning, and already received the results this afternoon! Everything is clearly explained and easy to read.
I can only say I’m extremely satisfied!

 

 

 

Mercedes Fontijn

June 2020
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Super convenient! Sent it yesterday afternoon, and by late morning the results were already in. Also very pleasant communication when you have questions. You’ve gained a loyal customer!

 

 

 

 

Dagmar Otten

November 2018
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I’m very satisfied with Worm&Co. You receive the results quickly by email, and the advice about which dewormer to give your horse also arrives quickly by post.

 

 

 

 

Janneke Knippels

October 2018
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I won a worm test kit through the Facebook giveaway. Everything arrived neatly, sent in the manure sample, and already had the results the next day 🙂 Everything was perfect! If I hadn’t known this, he would have had the full treatment this week for nothing — so I’ll save that one for later 😉 Thank you!!!

 

 

 

 

Tanja Eskes Suiker

October 2018
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What a super convenient system — I’m a fan! You get your results really quickly, and from there you receive advice on which brand of dewormer to use. You can then order the dewormer directly from their website. I say: TOP!

 

 

 

 

Jasmijn Snhater

September 2018
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Great company — I now do all my worm tests for our horse with Worm&Co, and I’m very happy with it. I receive the results within a day.

 

 

 

Wanka Adelaar

June 2020
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Great service — sent the manure on Thursday and by Friday afternoon I already had an email with the results.

 

 

 

 

Eveline van Kooten

March 2018
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Worm&Co has been testing my pony’s manure for 3 years now. I always receive the results within a few days. Unfortunately, the last time she did have worms. I was able to ask all my questions by email, app, and phone, and I got immediate answers — even in the evenings and on Sundays. Thanks to Worm&Co’s excellent advice and aftercare, the worms are now gone.

 

 

 

Elsbeth Postma

February 2018
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Last week I dewormed via Worm&Co for the first time. Sent the sample on Wednesday (the instructions in the kit were clear), and by Thursday afternoon I already had the results in my inbox — plus a direct order link! Definitely not the last time for me!

 

 

 

 

Lisan Hofman

November 2017
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Had a manure test done with Worm&Co for the first time — and definitely not the last! Very satisfied so far!

 

 

 

 

Mireille den Hoed 

November 2017
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Had a manure test done by Worm&Co for the first time... in one word: perfect! You receive the results very quickly by email. It’s super convenient that the link in the email takes you straight to “your page,” where you can see everything and order a dewormer right away. The advice and support from Worm&Co are also excellent. Questions by email are always answered quickly and thoroughly. Truly recommended!

 

 

 

 

Miranda Huisman

October 2017
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Today I received the results of the manure test for my 6-year-old Friesian mare Jelda — good thing I didn’t deworm her unnecessarily! This time it wasn’t needed at all. Thank you, Worm&Co, for the excellent service. I’ll definitely keep doing this with you!

 

 

 

 

Lilian Koolen

August 2017
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Super fast results by email and great advice. You can always reach out to them with questions. Not commercially driven. Professional. Really great that this service exists.

 

 

 

 

Mariel Huizing

August 2017
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I’m very satisfied with the service of this friendly company. Requested a manure test online, received the kit at the stable the next day, sent the sample, and got the results by email the following day. Everything perfectly organized. I can truly recommend this company — and all that for a great price.

 

 

 

 

Frederik Sennema

August 2017
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Amazing, easy-to-use kit and great service! I had the results within 12 hours!

 

 

 

 

 

 

Annique van der Valk

May 2017
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Top service!! Super fast results and excellent information.

 

 

 

 

 

 

Marjan Witte

May 2017
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Very fast results! Really great!

 

 

 

 

 

 

Cynthia Janssen

April 2017
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Today I had the lesson I won here.
I want to sincerely thank Worm&Co for the effort they made to make sure I could still use my prize.
At first, they had found someone who was very far away, but since that wasn’t an option for me and my horse, they looked for someone nearby. That’s how they found #SabienMollema.
I had a really great lesson, learned a lot, and received helpful tips to continue working with.

 

 

 

 

 

Syl Zwaan

February 2017
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Results received very quickly — already the next day! I just got the deworming advice — great service!! Thank you for answering all my questions!

 

 

 

 

 

Ilse van Gelderen

November 2016
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I could make it long, but only one word is needed: super.

 

 

 

 

 

 

Hunter Louka

November 2016
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Always great service! :-)

 

 

 

 

 

 

Dominique Bekker

November 2016
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Had a manure test done by Worm&Co for the first time... in one word: perfect! You receive the results very quickly by email. It’s super convenient that the link in the email takes you straight to “your page,” where you can see everything and order a dewormer right away. The advice and support from Worm&Co are also excellent. Questions by email are always answered quickly and thoroughly. Truly recommended!

 

 

 

 

 

Ashley Rol

June 2017
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Great service, lots of knowledge.

 

 

 

 

 

 

 

Robbert Bunning

July 2016
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Super fast! Sent it Thursday afternoon and already had the results Friday morning... incredibly quick — many companies could take an example from that.

 

 

 

 

 

 

 

Saskia Ruiz van der Vliet

July 2016
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Easy, fast, and very customer-friendly!

 

 

 

 

 

 

 

Louise Timmerman

June 2016
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Super professional and great to work with. You clearly know where you stand and can look everything up and review it! This is much cheaper and better than just giving a random dewormer.

 

 

 

 

 

 

 

Renske Dost

June 2016
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Clear website, and sending in the manure sample is super easy with the kit you receive at home. The results came in very quickly!

 

 

 

 

 

 

 

Tineke Robben

June 2016
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Good and fast service. They’re always reachable and happy to think along with you! Definitely recommended for every horse owner!

 

 

 

 

 

 

 

Linda Ruiter

October 2016
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Excellent service and very fast results. Clear answers the very next day and great deworming advice. Simply TOP!

 

 

 

 

 

 

 

Melanie van der Kraats

June 2016
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Works super easily and the results come in quickly. They also responded very fast and thoroughly to all my questions — absolutely great!

 

 

 

 

 

 

 

Marieke Wispels

June 2016
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Very well organized and results received quickly. Top!

 

 

 

 

 

 

 

Rita van den Engel

May 2016
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UPDATE: From 4 stars to 5 stars because I’ve already received the results!
Originally gave 4 stars as I still had to send the sample and didn’t know how long it would take with the Pentecost weekend in between.
So far, I’m very happy with how easy the process is and how quickly the kit was delivered.
Using the included glove, I took some of the fresh top layer of the manure and placed it in the first bag.
The second bag was already prepared with all the details and absorbent material — very convenient!
All I had to do was fill in the date and pop it in the mailbox.

 

 

 

 

 

 

Marjolijn van Ammers

May 2016
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Last week I ordered a kit to try it out, and I’m really pleased with it! They respond quickly and thoroughly to any questions I had, so I knew exactly where I stood — very nice! Sending the sample, getting the results, and receiving the advice all went smoothly and professionally. Thank you, Worm&Co! I’m going to order my yearly package!

 

 

 

 

 

 

 

Dian van der Broek

May 2016
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Great idea and perfectly organized!

 

 

 

 

 

 

 

Martijn Stroet

May 2016
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Simply great — easy, quick results, and better for your horse or pony’s health.

 

 

 

 

 

 

Anica van Huis-Kortekaas

October 2016

Blogs

Our blogs are packed with information about your pet’s health and everything related to worms.

How do I interpret the results?

A manure test alone does not determine whether a horse needs treatment. The questionnaire, the horse’s health and age, seasonal parasite pressure, and existing records also help assess whether treatment is appropriate.

Worm aneurysm vs Cyathostominosis

Worm aneurysm and cyathostominosis are often confused, but they are two completely different conditions, each with its own risks. In this blog we clearly explain what both problems are, how they develop and why good worm management is so important to prevent them.

Giardia in dogs and cats – what to do?

Giardia is a common intestinal parasite in dogs and cats. The parasite is microscopic and settles in the small intestine, where it multiplies and can cause symptoms. Not only young animals, but also adult dogs and cats can become infected.

 

 

My horse tested positive, but does not need treatment – how is that possible?

It can be confusing: you have a fecal test done and the result comes back positive. Yet, the advice is not to treat. How is that possible? We’ll explain.

 

Dewormed? Don’t forget the 14-day check!

When you deworm your horse, you naturally want to be sure that the treatment is actually working. A manure follow-up test gives you that confirmation.

When can your horse go back to pasture after a deworming treatment?

After a deworming treatment: pay attention to pasture management!

Effective parasite control doesn’t stop with giving the treatment.

Out partners

Together with our partners, we are committed to optimal animal health!

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