When thinking about your pasture and parasite management, we can consider the pasture as ‘low-risk’, (sometimes called safe pasture or clean pasture) or ‘high risk’ (dirty pasture). Low risk pasture is grassland with low number of infective parasites, and high risk is when animals grazing this field are at high risk of ingesting infective larva. Pasture grazed by lambs, lactating ewes or young cattle in the previous year is considered to be high risk. There are many strategies that can be used to reduce the risk of infection. Some of these are outlined below.