The effects of plant-derivative products (extracts of Salix, Tilia and Nymphaea) on the feed intake and aggression between cattle during the receiving period were assessed in imported heavy beef cattle (580 kg average liveweight). 800 Blonde D'Aquitaine bullocks, imported from France, were divided into two groups (control and treated). Treatment improved the feed intake (10.32 vs. 9.27 kg DM/head/day for treated and control group, respectively) and lowered the aggression between animals in terms of incidence of horn fractures (2 and 15% in treated and control group) and traumatic joint pathologies (0.5 and 6% in treated and control group). These results suggest that administration of plant-derivative product during the receiving period can improve the adaptation of bullocks to its new environment and social interactions.