Abstract
ABSTRACT Angus × Simmental, fall-born heifers (n = 120, yr 1, and n = 160, yr 2) were used to determine the effects of supplemental fat, differing in fatty-acid composition, on performance, plasma fatty-acid content, and reproduction of developing beef heifers. At 7 mo of age, heifers were randomly allotted to 1 of 4 supplements containing whole raw soybeans (SY); corn, soybean meal, and OmegaFlax (FLX); corn, soybean meal, and Energy Booster 100 (EB); or corn– soybean meal (CON). The SY, FLX, and EB supplements (FT) were formulated to have the same level of crude fat. The SY-supplemented heifers gained less (P = 0.04) BW than did FLX-supplemented heifers. The FT-supplemented heifers tended (P = 0.06) to gain more BW than did the heifers fed the CON supplement. The SY-supplemented heifers had greater (P
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