Rumen Fermentation Optimization of Kacang Goats Fed Complete Silage-Based Feed Sorghum-Clitoria ternatea with Various Concentrate Levels Contains ZnSO4 and Zn-Cu Isoleucinate Erna Hartati, Markus M. Kleden, Gusti A. Y. Lestari, I.G.N. Jelantik, and G. Oematan dan F.M.S. Telupere* Abstract This research was conducted to determine fermentation in the rumen, consumption,