Roughage intake in the home pen (mean ± SEM g/d).

1Roughage was provided ad libitum during the habituation period, one roughage type at a time.2Roughage was provided ad libitum, one roughage at a time (2 days per week without training).3Roughage was provided ad libitum, two roughage types at a time (1 day per week without testing). The two types of roughage provided were from the same source but had different particle lengths.