2.4. In vivo digestibility
At the end of the fattening period, five sheep from T0, six from T1,and five from T2 were separated to determine in vivo digestibility. Feces collection bags were fitted on the sheep for 8 days, the first day was foradaptation, and the remaining 7 days total feces were collected in the morning and in the afternoon. The feces were weighed and frozen at −4◦C.At the end, the individual samples were mixed and a half kg sample fromeach sheep was taken for analysis.Digestibility was determined as the difference between weight of ingested feed and weight of feces (Harris, 1970).