This should be considered when herb mixture extracts are applied. However, the inclusion of HEM did not affect feed intake during other periods in this study, suggesting that the negative effect of HEM on feed intake may have been diminished when pigs became older.
Moreover, in agreement with our previous study (Yan et al., 2010), the CATTD of DM and N were increased by the HEM supplementation throughout the experiment, which may have been responsible for an improved G:F ratio in the phase 1 and 3