For cattle that have been housed you can select an appropriate flukicide based on the stages of fluke it will treat.
Fasinex and Endofluke will kill all stages, including the early immatures, so can be used from 2 weeks post-housing.
Trodax and Closamectin target the immatures and adults so can be used from 7 weeks post-housing.
Zanil will only kill the adults so must only be used from 12 weeks post-housing.
Out-wintered cattle can be given a dose of Fasinex or Endofluke to treat all stages of fluke but be aware that flukicides have no persistent action and cattle can be re-infected almost immediately.
IMPORTANT: Only a small number of flukicides are licensed for use in dairy cattle. Please check the product label.
Chronic liver fluke peaks in late winter/early spring
This can cause poor fertility i.e. lower scanning percentages and higher barren rates
Closantel or Nitroxynil can be used to treat fluke from 7 weeks post infestation (do not use Triclabendazole at this time as repeated use can lead to resistance)
If possible move sheep to clean pasture after dosing