Holstein heifers (n = 27), averaging 161 ± 9 d of age and 157.5 ± 11.4 kg at the start of the study, were blocked according to BW and fed 1 of 3 dietary treatments. Dietary treatments included control, dried distillers grains fed at 20% of the diet DM, and RFDGS fed at 20% of the diet DM for 12 wk. Heifers were weighed every 2 wk to determine ADG. Hip and withers heights were measured on d 0, 42, and 84 of the study, and BCS were determined on d 0 and 84.