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Effect of ranking pigs on RFI on volatile fatty acid (VFA) concentrations (millimoles per gram) in feces of ROI1 pigs at day 70 (A) and day 134 (B) of age and in ileal digesta (C) and cecal digesta (D) of ROI1 and AT pigs. VFAs that do not share a superscript letter (a and b) are significantly different from each other (P < 0.05).
