“…Each growth curve has different characteristics and different mathematical limitations. Four nonlinear growth models: Logistic, Gang & Zhen (1997), Gompertz, Mignon-Grasteau et al (1999, Bertalanffy, Schofield et al (2013), and Richards, Knízetová et al (1995), equations are often used to fit the growth curve of poultry. The von Bertalanffy, Gompertz, and logistic models have a fixed growth form which inflection points at about 30, 37, and 50% of the asymptote, respectively while Richards model, which has a variable point of inflection specified by the shape parameter (d), Aggrey (2002).…”