This study was conducted to assess the eating behavior of the Nhan Chan Xanh chickens from 7 to 16 weeks of age under the choice feeding system. A total of 240 Nhan Chan Xanh chickens (120 males and 120 females) at 5 weeks old were divided into 6 barns. Fourteen feedstuffs were used, including pellet feed, crumble feed, whole corn kernels, ground corn, paddy rice, polished rice, large broken rice, small broken rice, whole green bean grains, soybean meal, fish meal, elephant grass meal, large gravel particles and small gravel particles. All the feedstuffs were supplied in separate feeders. The results indicated that each broiler consumed 73.5-74.3 g daily and there was not a significant difference between sexes. Although complete feed (pellet and crumble) was supplied, chickens still consumed the other feedstuffs, indicating their ability to regulate the intake of ingredients according to their nutritional requirements and hobbies. Approximate intake of dry matter, crude protein, crude fat and crude fiber were around 64.8 g/day, 9.2 g/day, 1.8 g/day, and 3.1 g/day, respectively. Nhan Chan Xanh chickens can make good nutritional choices and pick out the amount of feed intake that they need to be healthy and productive. The present findings corroborate previous studies about the alimentary preference and capacity of birds to balance their intake to fulfil nutritional requirements.