Employing a 3x3 factorial experimental in a Randomized Complete Block Design (RCBD), the study attempted to find answers to the specific questions presented in this study. The factors that were used in this study were the breed of broiler and level of metabolizable energy. The broiler breed has 3 levels, namely: Ross, Cobb and CP 707, while the metabolizable energy also has 3 levels as determined by various rate of discussion at different stages of the growing period. In comparing the production performance of the different breed as affected by three levels of metabolizable energy in the ration, the following parameters were used in this study: survival rate, body weight; feed consumption; feed conversion ratio; performances index; dressing percentage; quality of meat; and gross profit margin of production. The results showed that there was no significant difference in ,the levels of metabolizable energy in the breeds of chickens used in the study. However, significant level of metabolizable energy effects were observed on final bodyweight, feed consumption, feed conversion ratio, performances index, breast meat yield, abdominal fat yield, crude fat content of breast muscle and inorganic matter content of breast muscle. No significant levels of metabolizable energy effects were detected in the other variables in this study. Likewise, significant broiler breed effects were observed on the total feed consumption and on the gross profit margin of production. The birds, fed with metabolizable energy level 3 gave the highest final bodyweight but with the highest feed consumption which is the same as that of the birds fed with metabolizable energy level 1. However, the best feed conversion ratio was given by the birds fed with mebolizable energy level 3. Metabolizable energy level 3 also effected the highest performance index and highest breast muscle yield and the highest abdominal fat and breast muscle crude fat contents. On the other way around, the Cobb and the CP 707 consumed equal and highest amount of feeds compared with the feed consumption of the Ross broiler strain. However, in terms of gross profit margin of production, the CP 707 gave the best performance. In view of the above - stated finding and conclusions, CP 707 strain is recommended for commercial broiler production purposes in order to maximize profit.
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