The author is a lecturer at the Faculty of Animal Husbandry, Udayana University, Denpasar, Bali, since March 1987, since he was appointed as a lecturer, the author has conducted many studies on animal feed, especially on ruminants. The author is also a lecturer in S2 and S3 Animal Husbandry in the Masters and Doctoral Programs of the Faculty of Animal Husbandry.  there are several articles that have been published in national and international journals.  Authors can also be trusted as peer-reviewers in the Tropical Animal Science Journal Q2.  Until now the author was assigned as head of the lab at the Faculty of Animal Husbandry, Udayana University.