This paper used the Muth model to exemplify the market linkages among the com, ethanol and poultry industries. Ethanol demand is price inelastic, but the blenders' tax credit has a positive and significant effect in lowering the price of ethanol, increasing ethanol demand and increasing com demand. Information from derived ethanol supply functions was used to compute the marginal effect on poultry prices of changes in ethanol production. Four different elasticities of substitution between com and non-com input in ethanol and poultry production were used in the estimation. The result showed that the increase in the elasticity of substitution between com and non-com inputs in both industries will reduce the effect on poultry prices. This research indicates a long-run need for non-com input in both industries in order to reduce the effect on the three markets and the rest of the economy.