Liver fluke: The advice from the Department’s liver fluke forecast recommends treating outwintered sheep that are likely to face a liver fluke challenge in November, January and April. Farms with a history of serious liver fluke burden will need to treat more regularly and possibly as often as every four to six weeks in the worst affected cases.

In such a scenario, a treatment programme should be put in place with your vet to ensure adequate cover is provided and the risk of resistance developing is minimised by careful product selection. At present, product choice should still focus on treating mature and at least immature fluke stages. Avoid using combination products unless there is an identified need for treatment. Healthy ewes do not require treatment for worms.