Kampung Unggul Balitnak (KUB) chicken is a local breed developed by the Research Institute for Animal Husbandry (Balitnak) to enhance the productivity and quality of native chickens. This research aims to study the effect of administering a local lemon extract acidifier (Citrus Limon (L.) Burm f.) on the percentage of small intestinal weight in KUB chickens. The experiment was conducted over 12…