This study aims to determine the effect of fermenting rice rinse water on the digestive tract of Peking ducks. This research was conducted for 12 weeks and used 100 Peking ducks housed in the experimental cages of the Animal Husbandry Study Program, Faculty of Agriculture, University Sriwijaya. This study used a completely randomized design (RAL) with 5 treatments and 4 replications. The treatm…