Experiments were carried out to investigate the suitability of using chicken intestine as raw material for silage production and the effect of silage blended with rice bran or soybean meal in the diet of African catfish (Clarias gariepinus). In the first stage, to evaluate the efficiency of different concentration of citric acid to fermented chicken intestine at room temperature for 30 days. Acid silages were prepared using chicken intestine supplemented with four different concentrations (4% 6% 8% and 10%) of citric acid. After 30 days of fermentation, results indicated that protein and lipid in silages showed a declining trend significantly (p<0.05). However, protein content in silage fermented with citric acid 8% and 10% were significantly (p<0.05) higher than those fermented with 4% and 6%. In the next stage, Eight experimental diets containing various levels of rice bran (RB10, RB20, RB30 and RB40) or soybean meal (SB20, SB30, SB40 and SB50) were mixed in liquid silage and a commercial catfish feed was used as a control diet (Contr). Triplicate groups of 30 fish (initial weight: 16.05 g) were fed daily at 5% body weight for 60 days. Significant higher (p<0.05) in weight gain, specific growth rate (SGR) and lower feed conversion ratio (FCR) were observed in fish fed on Contr diet compared to those fed rice bran inclusion in the diets (RB10, RB20, RB30 and RB40) and some soybean meal inclusion diets (SB30, SB40 and SB50). However, the growth performance was similar in fish fed Contr and SB20 (p>0.05). No significant differences were detected in survival rates among fish fed all treatments (p>0.05). The carcass protein content were similar in all treatments (p>0.05). Lipid contents in fish fed soybean meal inclusion diets (SB20, SB30, SB40 and SB50) were significantly lower (p<0.05) than those of the rest diets. The study demonstrated that up to 20% of soybean meal could be incorporated in silage diets of Clarias gariepinus.