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New multiparameter biomechanics models for the characterization of leg bone strength in broiler chickens and turkeys were developed in this work. The effects of major physical and biochemical parameters (including the species of birds) that can contribute to mechanical properties of leg bone strength in these birds were also considered. Theoretical and experimental methods were developed in this study to model bone strength as functions of the parameters that can affect bone strength in these birds. The choice of any particular methodology depends on the availability of either physical or biochemical parameters that can be obtained from experimental data or other records. Possible useful practical applications of the principles developed in this technical article, particularly in the fields of bone strength enhancement in turkeys and broiler chickens, and medical applications to other animals and human beings, are discussed.