The effect of social rank, dietary fiber, and length of feeding stalls on the well-being of sows kept in groups was assessed on a sub population within the pens of the larger study. At gestational d 37, sows that were randomly assigned by BW and parity in a 2 × 2 factorial arrangement to a dietary treatment of either (a) soy hulls-wheat middlings diet (WM) or (b) DDGS-corn germ meal diet (DDGS); and feeding stall length of either (c) 2 ft. (short) or (d) 6 ft. (long) in groups of 9 sows/treatment (36/block), were put in a feed competition test to determine social rank (n = 48). Within each treatment pen, dominance value was calculated based on aggressive encounters among sows from the feeding test; with the 2 highest-ranking sows being dominant (DOM) and 2 lowest-ranking sows being submissive (SUB). Analysis of data was focused on this sub population of sows. Sow BW was recorded on gestational d 30, 70, 90, 104, and d 131 (end of lactation). Lesion scores and blood glucose levels were recorded every 3 d for 2-wks post mixing (Phase 1), and then bi-weekly until gestational d 104 (Phase 2). Live observations during feedings were performed at the first feeding, after mixing, and every 3-wk until gestational d 104, all aggressive encounters were recorded. Regardless of diet, SUB sows had greater (P < 0.01) blood glucose than DOM sows. Overall, lesion scores decreased in severity from phase 1 to phase 2, but in phase 2, DOM-sows had less severe scores compared with SUB-sows (P < 0.01). DOM-sows gained more (P < 0.01) BW from d 30 till d 70 of gestation, and then again from d 90 till d 104. Total number of aggressive encounters were lowest among DOM-sows fed DDGS-diet and in pens with long feeding stalls and these same sows made less aggressive encounters toward SUB-sows (P < 0.01). SUB-sows fed WM-diet had more (P < 0.05) total piglets born alive than DOM-sows fed the same diet. SUB-sows fed WM-diet and kept in pens with short feeding stalls had more (P < 0.05) total piglets born compared with SUB-sows on other treatments. These results indicate that dietary strategies and social status may serve as a management tool to improve sow well-being in small group pens.