Feeds and fecal samples were collected during the last 7 days of each period, dried at 60°C and ground to pass a 1-mm screen using a Cyclotech Mill (Tecator, Höganös, Sweden) and were analyzed using standard methods of AOAC (1995) for dry matter (DM), ash, and acid detergent fiber (ADF). Neutral detergent fiber (NDF) in samples was estimated according to Van Soest et al. (1991) with the addition of α-amilase but without sodium sulphite and the results were calculated with residual ash. Total nitrogen (N) of feeds, refusals and fecal samples were determined according to AOAC (1995).