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137at University of Pennsylvania Library on April 12, 2015 http://ps.oxfordjournals.org/ Downloaded from 1 Diets were mixed when P.B. meal was 0 weeks old. Diets were stored five weeks prior to feeding. 2 Diets were mixed when P.B. meal was 2 weeks old. Diets were stored five weeks prior to feeding. 3 Diets were mixed when P.B. meal was 6 weeks old. Diets were stored five weeks prior to feeding. 4 Mean + standard error of the mean. P.B.-unstabilized P.B.P.M. F-unstabilized feed. P.B.S.-stabilized P.B.P.M. FS-stabilized feed (ethoxyquin added at 125 p.p.m. when feed mixed).

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