In conclusion, feed intake was not altered in either broiler or layer chicks by the inclusion of two high fiber feed ingredients into the dietary formulation. Although feed intake was not different in either chicken line, broiler chicks had reduced ADG with the high fiber ingredients while the layer chicks performed equally well regardless of dietary fiber. The layer chicks responses can be attributed to greater fiber digestion and fermentation as layer chicks had increased aNDF disappearance and higher fiber diets stimulated aNDF disappearance. Although aNDF disappearance was altered by line and diet, AMEn was not altered by line or diet in this experiment. Although the mechanism is yet unclear it appears that layer chicks may tolerate higher concentrations of high fiber dietary ingredients in comparison to faster growing broiler chicks.