The cost of commercial feed is very exorbitant and inorganic elements used in poultry feed production are not available and/or affordable to small scale farmers that own greater part of poultry business in Nigeria. This study evaluated production performance of broilers fed rations containing natural clay for a period of eight weeks and the bioavailability of clay mineral. A total of 80 unsexed arbor acres broiler chicks were equally and randomly allocated to four treatment groups (Treatments

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... 4). Four treatment rations (isonitrogenous and isocaloric) were compounded and fed correspondingly to the treatment groups. Treatment 1 had no clay, 2 contained trace mineral elements from inorganic sources and both served as negative and positive controls respectively. Treatments 3 and 4 had 2% and 1% clay inclusion, respectively. Clay was found to increase trace mineral composition in feed, blood serum and liver tissue. Dose response to clay supplementation in favour of 2% inclusion confirms positive influence of treatment on production parameters and the bioavailability of clay minerals to the animal, and hence the possibility of clay being used as a replacement for trace minerals in broiler production.