The Control of Worms Sustainably in cattle (COWS) group has published the final chapter in its updated Guide. Titled ‘Integrated parasite control on cattle farms’, it brings together the key technical messages from previous chapters on roundworms, lungworm, liver and rumen fluke and ectoparasites and shows how they can be applied on farm.


“We were keen to show how the principles and treatments outlined in the parasite-specific chapters can be applied to some common farming scenarios,” says Rebecca Small, AHDB animal health and welfare scientist and co-ordinator for COWS.

“While the precise situation on every farm will be different, this last chapter offers an idea of how the different strategies for individual parasites can work together. In many cases, there is often a risk of one or more being a problem within the cattle enterprises on the farm.”


The five scenarios include a beef suckler farm with calves born in spring, a beef suckler farm with calves born in autumn, an autumn or spring calving suckler herd with animals bought-in, dairy herds grazing all summer with weaned calves and youngstock turned on the same farm, and finally dairy herds with weaned calves and youngstock kept at a separate unit. For each scenario a control plan for the grazing season is outlined, including possible tests that can be carried out, with a summary of the key points at the end.


The full guide sits at the core of the COWS initiative – outlining the latest science relating to parasite control in cattle. All five chapters sit on the COWS website and are freely available for vets, registered animal medicines advisers (RAMAs)/SQPs and cattle farmers.


Ms Small admits, “Working out an action plan to protect and treat a herd of cattle can be complex but the new Guide provides the answers to many of the common queries or questions about cattle parasites. In most cases, however, farmers should still seek advice from their vet and animal health adviser about the specific parasites affecting their animals.”

Control Of Worms Sustainably (COWS) is a voluntary initiative funded by a number of industry organisations including AgriSearch. It aims to provide the best available, evidence-based information to the beef and dairy cattle industries in relation to the sustainable control of both internal and external parasites. Visit the COWS website: for more information.