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  • 100g £19.89


Copro-nil is used for the prevention of animals eating their own faeces


Simply sprinkle COPRO-nil™ onto the animals normal food. Ensure that each meal is eaten and discard any food left over before the next meal. COPRO-nil™ can be used with both wet and dry food. The faeces produced from this food will possess a very unpalatable taste. All animals in the household should be treated at the same time to ensure good re-enforcement of the unpalatable 'message'. Remember that food takes 12 – 24 hours to pass through the digestive system so COPRO-nil™ will only be effective after this 'lag' time. This product is not an enzyme mixture which can alter the normal digestive process.

DOGS: One level teaspoon per day for every 10kg divided between feeds (generally recommended as twice a day) for 10 -14 days. Up to a maximum of 4 teaspoons per day.

COPRO-nilâ„¢ - A taste modifier to discourage coprophagic behaviour

Sprinkle evenly on the dog food at each feed, (moisten dry food if necessary). Eg a 20kg dog fed twice a day would require one level teaspoon in each meal. This will usually curb coprophagy for months, often permanently.

VERY SMALL DOGS AND PUPPIES: In dogs and puppies less than 5kg the amounts of COPRO-nil™ may be difficult to measure, so please contact your vet for advice.

CATS: ½ level teaspoon per day, divided between the feeds in a day for 5-7 days.

HORSES: 3 level teaspoons, morning and night, for 2-3 days may help to curb this habit.

For older dogs and cats who have been habitual coprophagics over a long period of time it may often be necessary to feed COPRO-nil™ for one month to six weeks to curb the habit.


Safe use in pregnant animals or animals intended for breeding has not been proven. If the condition of the animal worsens cease product administration and consult your vet.

Consult your vet BEFORE using COPRO-nil™ if your animal is on a restricted sodium (salt) diet or is receiving a vitamin or iron supplementation, or if your animal is taking epilepsy medication. Make sure the animals are not on steroids because this can counter the effect of COPRO-nil™. If in doubt please contact your vet.

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Reviews (2)

Summary of Reviews for Copro-Nil

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

Only verified purchasers of this product can leave a review.

15 No effect at all!
Verified Purchase

By on 23 January 2018

I think some products work on some dogs to stop this habit and other products work on other dogs, so it's largely a matter of trial and error. This had absolutely no effect whatsoever on mine, both of whom eat Fifi's poo. It was also somewhat inconvenient to use because the dose has to be split into two and I normally feed my dogs just once a day. I've now gone back to the Vetiq one and am going to persevere with that.

Customer does not recommend this product

15 No change
Verified Purchase

By on 15 April 2017

Our young dog (nearly a year old) doesn't eat his own faeces, just that of our other dogs. So I bought this to put on their food in a bid to stop him thjeoir faeces. It had no effect whatsoever.

Customer does not recommend this product

1 person found this review helpful

Q & A

Below are some recent questions we've received regarding Copro-Nil, including answers from our team.

23 May 2018 at 8:15pm


Sandra Tomsett

Im confused so hope you can help me. The dosage directions say a maximum of 4 teaspoons a day on your website but the actual container says 1 teaspoon per 10kg of body weight for a dog and doesn't give a maximum.
My dog weighs 62kgs . . . How much should l give her please . . . 4 or 6 spoonfuls per day.
Thank you.

  • VioVet Staff

Hi Sandra,

Thanks for getting in touch.

It is one teaspoon a day for every 10kg of bodyweight, but only up to 4 teaspoons a day. Even though your dog weighs 62kg, you should only dose 4 teaspoons.

I hope this helps.

29 December 2017 at 8:21pm


Sue Whitlock

  • VioVet customer since 2010
  • From: Durham, United Kingdom

Please can you tell me the active ingredient(s) of Copronil, and what else it contains? Thanks.

  • VioVet Staff

The ingredients are Yeast extracts, Thiamine, Ferrous sulphate, Glutamatic acid.

2 December 2016 at 4:10pm

Eating other dogs poo

Mr Robert Whitehead

  • VioVet customer since 2015
  • From: Dorset, United Kingdom

Does this work for eating other dogs poo or is it just for eating their own

  • VioVet Staff

This will only work for the faeces of dogs that have been fed the Copro-nil since by adding it to the dogs food it will make their faeces unpalatable. If you have more than one dog in the household you can feed it to all dogs to prevent the dog in question eating it but will not stop the dog eating poo from dogs not fed on Copro-nil.

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