Inclusion of wood shavings improved gain: feed by 8%, while cellulose inclusion had no effect (Amerah et al., 2009). Hetland et al. (2003) also found that diluting a wheat-based diet with oat hulls had no influence on the weight gain and feed intake but improved the corrected gain: feed. Similarly, in turkeys, diluting a maize-based diet with 4:100 (w/w) wood shavings was reported to improve the gain:feedduring the critical first 7 d post-hatch period (Santos et al., 2006).