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Gain:feed of grower pigs supplemented with 7.5 kg of encapsulated zinc butyrate (E-ZnB)/MT of feed and heat stressed. Pigs were supplemented with E-ZnB for 24 d (A), after the 24-d period pigs 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 (B). *The value is significantly different at P < 0.05. Values are expressed as mean ± standard error of the mean.
