Feeding
The most important tool in reducing the impact of worms is maintaining year round feed quality and quantity. Not only does this maintain body condition, enhance animal immunity and increase resilience; it also ensures young stock reach slaughter weight rapidly and are removed from the farm.

Pasture Spelling
Knowledge of the basic biology of worms is required if pasture spelling is to be used effectively.
Rotational grazing young stock of a single species is of little value. The spelling interval required is too long. Grazing intervals of 3–6 weeks can expose stock to maximum numbers of larvae.

Cross-Grazing with Different Species 
As cattle and deer share few worms in common with sheep, rotational cross-grazing lowers pasture parasite burdens and lengthens the spelling interval. Cattle also tend to open the pasture and increase clover content, further decreasing the burden.

Cross-Grazing with the Same Species
Non-lactating ewes have been shown to reduce pasture larvae by up to 90%^[8]. Adult cattle generally appear to be able to prepare paddocks for calves. As success depends on the level of immunity, consider factors that may enhance or depress immunity, and monitor egg counts, body weight, and body condition.

Grazing on Hay or Silage Regrowth and Direct-Drilled Paddocks
The worm burden will depend primarily on prior contamination, spelling length and destruction of worm habitat due to cutting height or pasture spraying prior to direct drilling. Spelling for two months or more plus the ensuing high quality feed normally would ensure worms have little effect.

Crops
New pasture and forage crops, if cultivated, have low levels of worm contamination.