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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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Questions & Answers for Copro-nil

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

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29th Dec 2017
Sue Whitlock
  • VioVet Customer Since: July 2010
  • From: Durham, United Kingdom

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

  • Veterinary Advisor

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

Eating other dogs poo

2nd Dec 2016
Mr Robert Whitehead
  • VioVet Customer Since: September 2015
  • From: Dorset, United Kingdom

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

  • Veterinary Advisor

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.