Beef cows housed in mud during late gestation have greater net energy requirements compared with cows housed on wood chip bedding.

There was no evidence of a treatment × day of gestation effect for 12th rib back fat ( P = 0.85), rump fat ( P = 0.48), total plasma protein concentrations ( P = 0.85), or plasma 3-methylhistidine ( P = 0.84); however, there was a marginally significant treatment × day of gestation effect for plasma non-esterified fatty acid concentration ( P = 0.09).

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