The chemical composition of the experimental rations is outlined in Table 3. Concentrations of NDF were slightly higher for the T85– diet compared with the other diets. Lignin concentrations were slightly lower for the T85 diets than for the AH diets, reflecting the higher lignin concentrations observed for AH compared with T85 (Table 2). Estimated NFC and NEL concentrations were similar for all rations, but would differ in the source of the NFC as the diets supplemented with T85 contained more corn grain.