Numbers of total, liveborn, and weaned male and female pigs (least square means ± SE) by sow treatment (a,c, and e respectively) and social rank (b, d, and e respectively). Sows in the hydrocortisone acetate (HCA) received 70 mg HCA twice daily; Stable sows were controls; Mixed sows were moved to a new pen weekly; and Companion sows received a new pen mate weekly. High rank sows were dominant to both pen mates; middle ranked sows were dominant to 1 pen mate; and low ranked sows were subordinate to both pen mates. The analyses used 25 HCA, 26 Stable, 15 Mixed, and 35 Companion sows and 40 high, 40 middle, and 21 low ranked sows. See online version for figure in color.