<![CDATA[Background: Feed cost is the main problem in KUB chicken farming because it can reach 60–70% of the total production cost. Small-scale farmers struggle with the high and unstable price of commercial feed. Therefore, alternative feed ingredients that are cheaper but still nutritious are needed. Tofu waste is chosen because it contains relatively high protein and is easily obtained as an agro-industrial byproduct. However, tofu waste has weaknesses such as high moisture content, crude fiber, and anti-nutritional factors. By processing it into flour, the material becomes more durable and can be mixed into the ration. Purpose: This study aims to determine the effect of tofu waste inclusion on feed intake, body weight gain (BWG), and feed conversion ratio (FCR) in KUB chickens, and to identify the optimal inclusion level. Methods: The experiment was conducted using a completely randomized design (CRD) with five treatments (P0=0%, P1=5%, P2=10%, P3=15%, P4=20% tofu waste) and five replications, involving a total of 75 KUB chickens. Parameters observed included feed intake, BWG, and FCR. Data were analyzed using ANOVA. Results: The inclusion of tofu waste flour at levels of 5%, 10%, 15%, and 20% had a significant effect (P<0.01) on feed consumption. Meanwhile, for body weight gain (BWG), overall results showed no significant effect (P>0.05), although in certain weeks (1, 2, 6, and 9) there was a significant effect (P<0.05). For feed conversion ratio (FCR), overall results indicated no significant effect (P>0.05). Conclusion: The use of tofu waste as feed for KUB chickens affected feed consumption, body weight gain (BWG), and feed conversion ratio (FCR). Feed consumption decreased as the level of tofu waste increased, from 2,557.13 g/bird (P0) to 2,494.26 g/bird (P4). Total BWG did not differ significantly, although in certain weeks there was an effect, with the highest body weight still observed in the control treatment. FCR also did not differ significantly, although it tended to increase at higher levels, indicating a decline in feed efficiency]]>
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