In this study, heritability was estimated for total weight at 2 -3 and 4 -5 months after hatching. Estimation was made on data from 109  full-sib families. The analysis of variance was performed using a univariate mixed linear animal model and variance components were analyzed following an animal model using Restricted Maximum Likelihood procedure (REML) employing average information (AI) algorithm. Heritability estimates (h²) for growth related traits varied considerably with ages. At 2-3 months old, h² for body weight (BW;0.05±0.03.) were low. At 4-5 months old, h² of BW (BW;0.58±0.44) were higher than those estimated at 2-3 months old. The same trend were observed as many previous study in body weight at harvest. The heritabilities showed good prospective for selective breeding of body weight.