In the immediate days after weaning piglets reared under modern intensive conditions are subjected to a variety of stressors which are often, because of the management systems used, Imposed concurrently. The largest stress may stem from the weaning process itself and the sudden removal of the comfort and nurture provided by the sow. It is also possible that the stress of relocation to new accommodation is a principal stressor and piglets must adapt quickly to different environmental conditions to avoid problems of depressed growth or post-weaning enteric disease. The stress of mixing piglets after weaning into new social groups may be one of the most significant influences of all. Intense agonistic interactions occur for at least 48 hrs after mixing as a new dominancy hierarchy is established. The purpose of the present work therefore was to examine at 2 centres, individual and combined effects of weaning, moving and mixing on the performance and behavioural characteristics of weaned piglets.