Weekly body weight of 993 offspring generated from direct crossing of indigenous chickens (Naked Neck-NN, Frizzle Feather-FF and Normal Feather-NF), locally adapted exotic (Nera Black-NB, White Leghorn-WL and Giriraja-GR) and crossbred chickens (FUNAAB Alpha-BA) were used to compute the absolute growth rate (AGR), absolute maturing rate (AMR) and relative growth rate (RGR) on the Logistic (L), the Gompertz (G), the Richards (R) and the Bertalanffy (B) growth function. The growth parameters A, B, k and m obtained from the growth function were used on their first derivatives to compute the AGR, AMR and RGR for the genotypes. In all the growth functions, GR was significantly better than other genotypes with respect to AGR. However, FF was significantly higher in AMR and RGR. The study showed that the indigenous genotypes were able to record better RGR than other genotypes through optimal protein deposition relative to initial weight, though the curve may not be as steep as that of tropically adapted exotic genotypes.