What technique is effective in managing parasites in sheep?

Rotational grazing is an effective technique in managing parasites in sheep because it disrupts the life cycle of the parasites that thrive in pastures. By moving sheep between different grazing areas, the pasture the sheep just left can recover, reducing the parasite load present in the environment. This method allows for the natural degradation of parasite eggs or larvae in the soil as they are exposed to sunlight and do not have a host to attach to. Additionally, it helps sheep access fresh forage, which can improve their overall health and immunity, making them less susceptible to infestations. This integrated approach helps in maintaining the health of both the flock and the pasture ecosystem.

In contrast, frequent vaccinations primarily target viral and bacterial diseases rather than parasites. Feeding high grain diets may not address parasite management effectively and can lead to digestive issues. The use of antibiotics is generally aimed at treating bacterial infections and does not have an impact on controlling parasite populations. Thus, rotational grazing stands out as the most effective technique for managing sheep parasites.