Feed waste, compared with that of control birds, was
numerically lower in birds in the HB-BT group for the
entirety of the study, and statistically so during wk
3, 4, 5, 6, 8, and 9 posttrimming. During wk 6 and 8,
the FW of birds in the IR-BT group was also significantly
lower than that of control birds (Table 2; P <
0.05).