Two 50 R. I. R. chicken groups were contrasted, both receiving the same basic-ration differing only in the content of wheat bran or corn cobs meal. One ration had 10% of wheat bran and in the other one the 10% of wheat bran has been substituted by 10% of corn cobs meal. It was found on the final weight a significant advantage of 12,8% with wheat bran. However, the development of chikens receiving corn cobs meal was quite normal.