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Effects of hydrolyzed feather meal, which was produced by high pressure cooking at 50 pound/square inch for 1 hour, substitution for soybean meal in growing-finishing pig diets were studied using 42 Large white pigs weighing 30 kgs body weight. The animals were individual fed diets containing hydrolyzed feather meal (HFM) at a level of 0 %, 5 %, 5 %+0.125 % lysine, 7.5 %, 7.5 %+0.125 % lysine, l0 % and 10 %+0.125 % lysine in the diet (a total of 7 diets) both at growing (30-60 kgs) and finishing (60-90 kgs) periods. Substitution of HFM for soybean meal in growing pig diets significantly (P.05) decreased average daily gain (ADG) and feed conversion ratio (FCR) of the animals. However, inclusion of 7.5 % HFM either supplemented or non-supplemented with 0.125 % lysin gave a satisfactory performances of the pigs. Inclusions of HFM upto 7.5 % either supplemented or nonsupplemented with 0.125 % lysine in the diets did not affect ADG and FCR of the finishing pigs. Total substitution of soybean meal by HFM (10 % in the diet) with 0.125 % lysine supplementation show a similar performance of finishing pigs to those on control diet. However, inclusion of HFM upto only 7.5 % in growing and finishing pig diets could gave a satisfactory carcass quality.