2.2 Apparent total tract digestibility
Two faecal collections were performed for a period of five days starting on day 57 and the other starting on day 86 of the feedlot period to obtain the apparent digestibility. Faecal samples (approximately 200 g wet weight) were collected for each bull from the rectum two times daily (minimum 3 h intervals between samples) and pooled by bull for each 5 day sampling period.