illustrated that in general there is a positive correlation between voluntary intake and in vivo digestibility. In the present study, ปริมาณวัตถุแห้งทีกิน was not influenced by inclusion of สารสกัดจากเปลือกทับทิมin the diets which was probably due to lack of differences in nutrient digestibility. The effects of secondary metabolites on feed intake in ruminants have been inconsistent among studies