Internal parasites are part and parcel of the animal’s ecosystem, or its “body ecology.” Wild ungulates are continually moving, leaving their parasite loads behind where they desiccate in the sun or just plain run out of nourishment before the animals return to the pasture. However, animals that are subjected to pasture or loafing areas without adequate rest will build up parasite loads, especially on humid landscapes, where moisture and temperature are conducive to their growth and reproductive cycles.
Young animals and those with weakened immune systems are most vulnerable, and this includes pregnant and lactating animals. Never allow your stock with parasite challenges to become underweight.
Parasites: Landscape Management
The first and most important component in parasite management is landscape management by employing sound rotation practices. This includes not only the adequate amount of time for the rest period between rotational grazing, but also grazing height management.