The recent welcome rain is providing ideal conditions for parasites, especially gut worms, to thrive on pasture. This is contributing to the normal build-up of worm larvae on pasture that occurs each year as the season progresses, which can overwhelm animals, leading to clinical disease. First-season grazing calves, particularly dairy calves, are at highest risk of scour, weight loss or poor performance, so it is important to take action early.

The first step to controlling parasitic worms on the farm is to have a plan. It is never too late to do this, so if you do not yet have a farm-specific parasite control strategy for your herd, work with your veterinary practitioner to develop one. Equally, if a plan is in place, this is a good time to review it.