Gloucestershire sheep farmer Kevin Harrison uses the Scops guide on a regular basis to make decisions about his flock, remind himself which group a wormer belongs to, or check other details.

By keeping sheep on clean grazing and taking regular faecal egg counts (FECs), the North Yorkshire farm, which was once seeing anthelmintic resistance issues, is now using wormers sparingly.

Sheep farmers who have not yet dosed lambs this season with a newer group 4-AD (orange) wormer are being urged to do so now, following a major peak in worm egg counts. Data from a worm egg ...

That was the stark warning from the National Sheep Association (NSA), the Sustainable Control of Parasites in Sheep group (SCOPS), Moredun Research Institute and the Sheep Veterinary Society (SVS), ...