True metabolizable energy and true amino acid availability were determined by the method of Sibbald with adult roosters in order to evaluate the nutritive values in some Philippines feedstuffs (corn, rice bran, coconut oil meal, legume seeds and leaf meal) to poultry and the following results were obtained.
　True metabolizable energy values of by-­product feeds were largely affected by crude fat and crude fiber contents. Among the three legumes, mung bean was the highest in the nutritive value, while rice bean was the lowest. The nutritive value of cassava leaf meal was higher than ipil-ipil leaf meal, suggesting that it is a good feed substitute for the ipil-ipil leaf meal.