The increasing resistance to parasites necessitates the exploration of alternative methods of parasite control.
Condensed tannins are known to inhibit the development of gastrointestinal parasites. The aim of this study was to investigate the effect of varying proportions of dried sainfoin (Onobrychis viciifolia) in the feed ration on egg excretion and weight development in 24 lambs infected with Haemoncus contortus .