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Sixteen experiments were conducted to measure the ME and ATTD of corn,soybean meal (SBM) and DDGS with or without feed enzymes.Phytase inclusion in the diet was 100 mg/kg (Phy,1000 FYT/kg);xylanase was 200 mg/kg (Xyl,200 FXU/kg),and protease was 200 mg/kg (Pro,15,000 PRO/kg) The enzymes were obtained from DSM Nutritional Products.