There has been a challenging start to the grazing season across the country with an unusually cold and dry April leading to poor grass growth in many regions. This is likely to have an impact on the parasites that we often expect to see at this time of year and emphasises the importance of monitoring flocks to make sure any treatments are given at the correct time. NEMATODIRUS Lambs that are grazing fields that were grazed by lambs the previous year will be at risk of Nematodirosis – caused by the Nematodirus battus worm. We would usually expect Nematodirus to cause problems in lambs that are 6-12 weeks of age coinciding with when they are likely to have started eating decent quantities of grass. This year there has been less grass available, potentially leading to poor ewe milk production, with the knock-on effect that lambs may be grazing grass at a younger age and therefore at risk of worms earlier than usual.
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