Least square means ± standard errors of the body weight of (A) mixed-sex chickens, (B) male chickens, and (C) female chickens at birth and 4, 8, 12, 16 weeks of age (BW0, BW4, BW8, BW12, BW16); average daily gain of (D) mixed-sex chickens, (E) male chickens, and (F) female chickens from 0–4, 4–8, 8–12, and 12–16 weeks of age (ADG0–4, ADG4–8, ADG8–12, ADG12–16); breast circumference of (G) mixed-sex chickens, (H) male chickens, and (I) female chickens at 8, 12 and 16 weeks of age (BrC8, BrC12, BrC16) between the on-site farm (red bar) and on-station (blue bar) experiments using Thai native chickens (Pradu Hang dum). Means for the same trait with different letters (a, b) differ significantly (p < 0.05).