Figure 7.

Circulating glucose concentrations in response to dietary treatment applied prior to and during a heat stress challenge. Heifers were fed one of two dietary treatments: (1) control (CON), fed a standard feedlot diet, or (2) the same standard feedlot diet with 1.5 g·hd⁻¹ · d⁻¹ live yeast and 2.5 g·hd⁻¹ · d⁻¹ yeast cell wall product (YEAST) for 33 d prior to the heat stress challenge. Data are presented as LSM ± SEM. Blue shading represents the thermoneutral (TN) period, and red shading represents the heat stress (HS) period. There was no difference in change in circulating glucose throughout the challenge period (P = 0.95).