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This study was conducted to evaluate the carcass yield, meat quality, sensory evaluation and input use efficiency of West African dwarf (WAD) goats fed Pleurotus tuber regium treated cassava root sievate (PTRCRS) based diets. Thirty-two WAD goats between six and eight months old were randomly divided into four groups of eight goats each. The four experimental diets were formulated to contain 0, 20, 40, and 60% dietary levels of inclusion of PTRCRS respectively. The groups were randomly assigned to the four experiment diets (T1, T2, T3, and T4) for 90 days in a completely randomized design. The results indicated that warm carcass weight, dressing percentage, loin and set weights were significantly (p<0.05) improved in T3 and T4. Liver weight was significantly (p<0.05) reduced in T3 and T4. Sensory evaluation, proximate composition and pH of the meat were not (p>0.05) statistically influenced. The total cost of feed, feed cost/weight gain, benefit per body weight gain and cost-benefit ratio were significantly (p<0.05) influenced. The study showed that the inclusion of PTRCRS in the diets of WAD goats enhanced carcass yield, and benefit per body weight gain of the goats, and hence could be included in goat diets up to 60%.