Complexity of abomasally infused carbohydrate did alter ileal sections in that total (P = 0.01) and mucosa(P = 0.02) weights were greater for A-SH compared with A-G. Total colonic section weight was increased (P =0.02) with SH infusion and tended (P = 0.06) to increase with dietary MEI but was unaffected by the site of SH infusion or form of abomasally infused carbohydrate.