Objectives were to determine the effect of prepartum dam supplement level on growth performance, feed efficiency, and reproductive performance of female progeny (127 heifers in yr 1, n = 9 dam pastures; 138 heifers in yr 2, n = 9 dam pastures). Mature, multiparous, Angus × Simmental cows (BW = 623 ± 70 kg; BCS = 5.7 ± 0.7) were offered 1 of 3 supplement levels (supplement contained 70% dried distiller’s grains plus solubles and 30% soybean hulls; fed 103 ± 11 d prepartum to 2 ± 11 d postpartum): no supplement (NS), 2.16 kg/d·hd⁻¹ (LS), or 8.61 kg/d·hd⁻¹ (HS) while grazing tall fescue pastures. Heifer progeny were weaned at 187 ± 11 d of age and retained as replacements in a fall-calving system. Experimental unit was pasture (9 per year), and data were analyzed using PROC MIXED in SAS. Dam prepartum supplementation did not affect (P = 0.99) heifer progeny BW at weaning. During a 70-d intake and feed efficiency evaluation, starting at 305 ± 31 d of age, DMI, ADG, and RFI were similar (P ≥ 0.14) among heifer progeny, regardless of dam supplement level. Heifer body weight and BCS, at start of 1st breeding season, also did not differ (P ≥ 0.60). Body weight at pregnancy verification, percentage of heifers that conceived to AI in 1st breeding season, and overall pregnancy percentage in 1st breeding season were not different (P ≥ 0.51) among heifer progeny, regardless of dam supplement level. At first calving, calf birth BW and percentage of unassisted births were similar (P ≥ 0.32) among heifer progeny, regardless of dam supplement level. Milk production also did not differ (P = 0.48) among heifer progeny, regardless of dam supplement level. In conclusion, these data suggest that within a fall-calving fescue-based production system, supplementing dams with 2.16 or 8.61 kg/d·hd⁻¹ of a DDGS-based supplement does not affect growth performance, feed efficiency, and reproductive performance of subsequent female progeny.