A technique was developed for the resuscitation of hypothermic newborn lambs. This technique consisted of three major components: the administration of glucose solution by intraperitoneal injection to lambs aged six hours or more in order to reverse hypoglycaemia (10 ml/kg of a 20 per cent solution); rewarming the lambs in air at 40 degrees C; and careful attention to the nutrition and husbandry of the lambs after rewarming. The results indicate that careful application of this technique during lambing would considerably reduce the losses from hypothermia.