Table 1. Seven different dietary treatments of the experimental design

Treatment	Description
PC	Positive control diet to meet or exceed Ross 308 specification
NC-1	40 kcal/kg ME level reduced from PC diet
NC-2	80 kcal/kg ME level reduced from PC diet
NC-3	120 kcal/kg ME level reduced from PC diet
NCX-1	NC-3 diet with 1,500 U/kg xylanase supplementation
NCX-2	NC-3 diet with 3,000 U/kg xylanase supplementation
NCX-3	NC-3 diet with 4,500 U/kg xylanase supplementation

NC, negative control; ME, metabolizable energy.