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Ileum morphology of control (left) and E-ZnB (right) supplemented pigs after 7 d of biphasic HS. Pigs were supplemented with 7.5 kg of encapsulated zinc butyrate (E-ZnB)/MT of feed for 24 d, and after the 24-d period, pigs were continued supplementation with E-ZnB and heat stressed for 7 d at 30 to 32 °C during the day and 28 °C during the night. Ileum morphology was measured from samples collected at the end of the 7-d HS period. n = 6.
