Pigs in FM-AA, WPC-AA, and AA had greater ( Pā<ā0.05) ADG and gain:feed than pigs in FM-WPC during wk 1 (phase 1). Treatments were 1) FM-WPC: diet with fish meal (FM) and whey protein concentrate (WPC) 2) FM-AA: diet with FM and crystalline amino acids (L-Lys, L-Thr, L-Trp, DL-Met, L-Val, and L-Ile) 3) WPC-AA: diet with WPC and crystalline amino acid and 4) AA: diet with crystalline amino acid. This study was to evaluate the effect of replacing fish meal and/or whey protein concentrate in nursery diets with 6 supplemental amino acids on growth performance and gut health of post-weaning pigs. Availability of increased number of supplemental amino acids including Lys, Met, Thr, Trp, Val, and Ile allows replacing expensive protein supplements to reduce feed costs. Limited availability of fish meal and whey protein concentrate increases overall feed costs.
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