Flubenvet Wormer

Flubenvet Wormer
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1% » 60g Tub

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  • 1% » 60g Tub £32.99


We can supply Flubenvet for chickens which are not kept as a commercial enterprise, the ideal worm treatment for "back-yard" birds — it is safe to eat eggs from treated birds even during treatment. Flubenvet kills worms and their eggs and is a sensible measure for any previously untreated free-range bird which is showing non-specific illness, or where worms are diagnosed or suspected.



The amount of Flubenvet used is based on the weight of the feed, not of the animal. For example, 60g of product (the whole tub) medicates 20kg of feed. See below for more information.

Flubenvet is provided with a handy small scoop so that the correct amount can be added to food. Treatment is normally continued daily for seven days, then repeated three weeks later. Free-range chickens should be kept in as large an area as possible, for welfare reasons and to reduce the parasite build-up on the ground. Moving the birds to a fresh area is also a big help, and ideally is combined with a worm treatment to help keep the new ground clean.

Chicken and geese

60g of product (whole pot) medicates 20kg of feed, when fed for seven days, this will medicate 19 laying hens

30g of product medicates 10kg of feed, when fed for seven days, this will medicate nine laying hens

6g of product medicates 2kg of feed. Feed use over seven day period (kg) divided by 0.33 = Flubenvet required for whole flock over seven days (g).


60g of product (whole pot) medicates 30kg of feed

18g of product medicated 9kg of feed

6g of product medicates 3kg of feed

Should be fed for seven consecutive days. Incorporate required amount into the daily feed ration.

Scoop included = 6g of wormer

Must be mixed well into feed.

Browse our non-prescription medications.

Need help or advice? Contact us:

  • Landline: 01582 842096
  • Mon - Fri: 8:00am - 5:45pm
  • Sat: 9:00am - 1:00pm
  • Email: [email protected]

All prices include VAT where applicable.

Medication Datasheets

Reviews (140)

Summary of Reviews for Flubenvet Wormer

Overall 5
Ease Of Use
Value For Money
Absence Of Side Effects
139 out of 140 (99%) customers would recommend this product.
5 stars (111 reviews)
4 stars (25 reviews)
3 stars (3 reviews)
2 stars (1 reviews)
1 stars (0 reviews)

Only verified purchasers of this product can leave a review.

55 Simple to use
Verified Purchase

By on 8 November 2021

Very easy to calculate dose required and to administer with feed.

Customer recommends this product

45 Chicken wormer
Verified Purchase

By on 7 November 2021

Bought for my backyard free ranging chickens. Straightforward instructions, so easy to use

Customer recommends this product

45 Chicken wormer
Verified Purchase

By on 21 October 2021

It’s easy to make up the feed with the powder, and it doesn’t affect the eggs

Customer recommends this product

55 Always satisfied
Verified Purchase

By on 10 September 2021

Flubenvet is the best and easiest wormer for chickens

Customer recommends this product

55 Sorted the chickens out
Verified Purchase

By on 6 September 2021

Easy to follow instructions, and done the job

Customer recommends this product

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Q & A

Below are some recent questions we've received regarding Flubenvet Wormer, including answers from our team.

26 November 2021 at 10:11am

Duck worming

Jayne Connelly

I have 2 ducks who live with my 7 hens. Can I use Flubenvet to worm them at the same time as they eat the same food?

  • VioVet Staff

Unfortunately Flubenvet is not licensed for use in ducks, only chickens/geese/turkey. It may be safe off license for use in ducks but we cannot provide off license advise. We recommend chatting to your local vet for guidance on off license use of the product as they are legally allowed to provide off label advice for animals under their care.

5 May 2021 at 3:16pm



what is the withdraw on this wormer please and does it cover roundworm

  • VioVet Staff

Flubenvet 1% Medicated Premixture is effective against gapeworm, large roundworm, caecal worm, hairworm, and gizzard worm.
The withdrawal periods as per the datasheet are below:

Withdrawal periods
Birds must not be slaughtered for human consumption during treatment.
Treated birds may be slaughtered for human consumption only after 7 days from the last treatment.
Chickens, Turkeys and Geese: Meat - 7 days
There is no withholding period for chickens producing eggs for human
consumption when the product is used at the recommended inclusion rate.

Chickens: Eggs - Zero days

12 October 2020 at 4:52pm

Young chicks


Can this product be used on 6 week old chicks?

  • VioVet Staff

There is no minimum age given by the manufacturer. However most people start worming just before chicks are of egg laying age at around 16 weeks.

18 August 2020 at 8:47am

How many chickens does 6g treat?

Lucy Diciancia

I have 4 chickens and added 6g into 2kg of feed as the label said so, but it doesn’t state how many chickens this will treat? Should I add more wormer to the feed? For it be effective

  • VioVet Staff

The dosing guidelines take into account how much the average chicken will eat. If the 2kg bag of feed runs out before the 7 day dosing period is finished then mix another batch of 2kg feed with 6g fenbendazole and keep feeding until this period is finished. Equally if it is not finished then do not worry, your chickens will have eaten the correct amount if mixed thoroughly.

31 July 2020 at 12:58am

What animals does this cover


Hi I was just wondering if this also covers rabbits,guinea pigs, quails and ducks. Kind regards

  • VioVet Staff

This product is licensed for use in Chickens, Geese and Turkeys. It can be used off license in other birds too (such as ducks/quails) but you will need a written prescription from your vet in order to purchase this for them.
If you are looking for a standard wormer for your rabbits/guinea pigs then I would advise Xeno-450 spot on.

27 July 2020 at 11:52am

Worm life cycle

John L

We recently treated our flock with flubenvet but the second batch was delayed in delivery so the gap between treatments was about 6 weeks. Should we give another dose 3 weeks on from the last one? I'm worried the 6 week gap will make the treatment ineffective because of the worm life cycle. Is that right?

  • VioVet Staff

Worming twice with Flubenvet is recommended because their will be some worms within your flock that are still as eggs inside them when you worm the first time. These will not be killed and will hatch within 3 weeks, the second worming dose will kill these.

If you have left 6 weeks then a second dose now will eliminate any newly hatched worms present but there is a small chance that they have reached maturity and have already laid eggs which are now in the soil/faeces. If your worm burden is not severe then this will likely be fine but if you are having serious issues with worms then I would advise repeating the initial course.

16 July 2020 at 1:38pm

How you use it


My chickens free range - can you put in their water

  • VioVet Staff

This product is administered by mixing it into your chicken's feed. I recommend seeing the product data sheet for exact guidance on how to do this.

16 December 2018 at 10:55am

Shelf life of product


What is the shelf life of Flubenvet 1% in a 60g tub please? And what is the expiry date on your current stock? Thanks.

  • VioVet Staff


Thank you for your message.

I have heard back from the manufacturers who have advised the following :

I am sorry that a broached shelf life has not been established for Flubenvet 1%. It was originally designed to be used on large poultry units where the whole tub would be used as soon as it was opened. We have made our regulatory team aware that today's users would find a broached shelf-life useful and believe they are working on a solution.

If it is stored according to the instructions and no contamination is allowed to enter the container, it is likely to remain stable until the expiry date:

Do not store above 25 °C.

Store in tightly closed original containers.

The product will remain stable in the finished feed for eight weeks."

Hope that helps,


19 September 2018 at 1:34pm

Wormer and eggs


Can you still rather the eggs after working your ducks and geese or do you have to wait?

  • VioVet Staff

Hi Denise,

Thanks for your enquiry.

The withdrawal period stated on the tub is nil for eggs from laying hens. This means that you can continue to eat eggs whilst your chickens are being wormed.

Hope this helps.

5 September 2018 at 4:07pm

How often do you worm chickens with Flubenvet?

Tam holman

How often do you worm chickens with Flubenvet?

  • VioVet Staff

Hi there,

Ideally you should worm with Flubenvet every 12 weeks to 3 months.

Hope this helps.

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