Parasitic infections are among the most significant health problems found in farm animals. The focus here is on parasitic worms, parasitic insects and mites, and coccidia. Organic farms tend to be more strongly affected by problems with parasites as the animals must be given access to pasture and/or outdoor runs and thus come into greater contact with parasites while at the same time prophylactic medication is prohibited. At present the use of wormers consisting of synthetic active ingredients is commonplace on both organic and non-organic holdings. There are several concerns around their usage, such as reduced effectiveness as a result of resistances, residues, and their impact on soil organisms. In recent years we have researched non-pharmacological control strategies (e.g. pasture management, selection of robust animals) as well as various control strategies based on secondary plant compounds (bio-active forage plants) and anti-parasitic fungi (biological control). Some of these strategies are still under development. Others are ready for implementation and, in particular, their additive effects can be utilized.