Parasite Watch, Sheep farming

To act or not to act: Putting real-time parasite risks on the map

SQPs and livestock farmers will be able to get up to date parasite information in their local area thanks to the monitoring of worm, fluke and fly levels on 18 farms across the UK.


The Parasite Watch scheme run by Zoetis, is now in its second year. The 18 farms involved in the scheme will have faecal samples taken every two weeks, which will help detect major stomach worms and Nematodirus.

Fluke will also be tested quarterly using copro-antigen testing, which will pick up immature fluke at six weeks of age, giving farmers and SQPs the most advance warning they can. Flies will be monitored on the farm using fly traps.

How to use Parasite Watch  

The aim of Parasite Watch is to not only inform the farmers involved in the project about parasite levels on their farm, but to alert SQPs and livestock farmers to parasite risks in their local area by an interactive map, which can be found at

Parasite data on the interactive map from each of the farms will be updated regularly. This  will allow SQPs and farmers to see if there are spikes in certain parasites in their area and enable them to take appropriate action.

The results and stories from these farms will also be shared on Facebook (SheepFarmersUK) and Twitter (@Sheep_farmers), so make sure you follow us to stay up to date.

With warmer weather enabling a longer grazing season and milder winters leading to more parasite survival, farmers need to have some degree of knowledge about parasites on their farm and in their area. As well as monitoring parasite risks by using the Parasite Watch map, farmers should also be using faecal egg counts and monitoring growth rates.

If Growth rates are below your target, that is the time to start investigating, it is impossible to judge by the calendar or what happened last year, you’ve got to look at stock, weigh stock and know what is going on.


Sheep farmer tackles worms

Sheep farmer John Yeomans, Newtown, Wales, is one of the 18 farms involved in Parasite Watch.

He was involved in the scheme last year and says as a result of monitoring growth rates and cross referencing with faecal egg counts, he had some sheep that didn’t require any drenching last year.

He farms 500 Beulah/Speckled Face ewes and 200 ewe lambs, lambing in Mid-March.

In mid-May lambs are weighed before being turned on to the hill and are weighed at least every month thereafter, until they are weaned in July.

 “Last year, if we had lambs that were growing 200g a day or less, we were taking faecal egg counts. In the main, those with lower growth rates had more of a challenge with worms,” he says.

Mr Yeomans also didn’t worm ewes in good condition at turnout last year. “I aim to leave at least 20% of ewes un-wormed- so last year I had some ewes, which weren’t wormed at all.”

Find out more about our Parasite Watch farmers and the challenge in your area on


For further information, please see the product SPC, or contact your veterinary surgeon, SQP or Zoetis UK Ltd, Walton Oaks, Dorking Road, Walton on the Hill, Tadworth, Surrey, KT20 7NS. Customer Support 0845 3008034. . Always seek the advice of your medicines provider. Use medicines responsibly (  AH248/17