This experiment was conducted to evaluate the replacement of 20 percent whole wheat in diet of broiler chicken starting at 28, 35, 42 and 49 d of age. All diets were fed up to age of 56 d. whole wheat replacement did not have any significant effect on average weight gain until 49 d of age, but, the birds treated at 28 day of age were lighter than control or other treatments at 56 d of age. Feed consumptions and feed conversations were similar between control and treatment groups. Percentage of carcass and fat pads were not significantly affected by whole wheat replacement or sex of the birds. Thus 20 percent whole wheat replacement starting at 28 or 35 d may have an economic value if the birds are slaughtered at 49 and 56 d of age, respectively, as whole wheat price is usually much higher than that of conventional broiler diets.

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