This study was carried out to estimate variance components and heritability for tibial dyschondroplasia, valgus-varus deformity, hock burns and foot-pad bums. A total of 1,404 1-d old Hubbard chickens were used. Individual weekly body weights, sex and the leg disorders were recorded. At slaughter, left leg was removed from each carcass and tibia was examined for the prevalence of tibial dyschondroplasia. All statistical analyses on leg problems were carried out using binomial form of the data. Sire and error variance components were estimated using REML based on a model including sire, sex and hatch.