Pelleting swine diets is a technology used by the feed milling industry where a meal diet is subjected to heat and/or moisture and then pressed through a die to agglomerate smaller particles into a larger composite (Hancock and Behnke, 2001). Feeding pelleted diets improved nutrient digestibility (Wondra et al., 1995; Rojas, 2015) and feed efficiency (Wondra et al., 1995; Nemechek et al., 2015) and, in some experiments, increased rate of gain (Wondra et al., 1995; Myers et al., 2013; Nemechek et al., 2015). Results of several experiments indicated that there is no effect of diet form on carcass characteristics (Wondra et al., 1995; Myers et al., 2013; Nemechek et al., 2015); however, others have reported increased dressing percent (Fry et al., 2012), backfat, and belly fat (Matthews et al., 2014) of pigs fed pelleted diets. Pigs fed pelleted diets have a greater instance and severity of gastric lesions than meal-fed pigs (Gamble et al., 1967; Wondra et al., 1995), but the effects of pelleting diets containing 30% distillers’ dried grains with solubles (DDGS) on stomach morphology or the effect of pelleting alone on gastrointestinal (GI) tract traits are largely unknown. Therefore, the objective of this experiment was to determine the effects of feeding pelleted diets without or with DDGS on carcass characteristics and GI weights of growing–finishing pigs to explain previously reported differences in dressing percent.