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Skin temperatures in heat-stressed wether lambs supplemented with ractopamine or zilpaterol. Data are shown for unshorn skin (A) and shorn skin (B) temperatures measured by hand-held infrared guns at emissivity of 0.4 to 1.0. No effects of supplement or interaction (G*S) were observed, and thus only main effects of environmental group are shown. *Means differ (P < 0.05) within the emissivity level.
