Worm control: Recent warm wet conditions in some areas will have increased the chances of worm burdens rising on pastures.

Grazing management can have an influence on the level of infection. Pastures where cattle and sheep have been grazed together should have a lower cattle worm burden and also paddock grazing systems will carry lower worm burdens than set stocking systems. Spring-born calves have no immunity to worms but adult cattle will have attained some immunity in their first grazing season. Dairy-bred calves are very susceptible to worm infection and should be treated as priority when treating stock.