was shown in geese given a 400 g/kg rice husk diet compared to those fed the ground maize diet (Lu et al., 2011b). Differentresults were also found in wheat-fed broilers, with a dilation of the proventriculus in birds fed ground wheat comparedwith those fed whole wheat (Gabriel et al., 2003a,b). Wood shavings increased the relative gizzard weights compared tothe ground and whole wheat diets treatment (Amerah et al., 2009).