Regular deworming is possible in principle, but needs to be critically questioned due to critical consumer expectations and increasing resistance. Due to increasing resistance in recent years, alternatives to parasite control are being sought. Secondary plant ingredients in particular seem to have a certain effect, although an effect on blood-sucking endoparasites cannot be clearly demonstrated.
When using herbs and spices as supplementary feed, one group of active ingredients, such as: B. the condensed tannins in certain feed plants. All plant material used has one or more properties (worm-killing, digestive, appetite-stimulating, antispasmodic, etc.).
The aim of these studies is to determine, on the one hand, whether feeding three different herbal and spice-based supplementary feed products on the market to grazing sheep is practicable (different administration regimes), and on the other hand whether an effect on the development of parasites in the grazed animals can be demonstrated.