The experiment was carried out by the method of comparative subdivision with a total of 72 crossbred wild boars were divided into two experimental groups, Experiment 2 times per 18 pigs/lot. The experimental groups to ensure uniformity of seed, age, weight and health status and repeated. The cross-bred wild boars were raised in semi-wild condition and supplied with additional 2-3 meals per day depending on age period. Experimental diets were designed as follows: The energy exchange 3000 - 2900 and 2900 - 2800 kcal respective growth stages and martial fat, respectively plots 1 and 2, two experiments with the same level of crude protein is 14-16 percent and amino acids were calcu]ated as proposed by the ARC in 1981, Wang, Fuller 1989, Cole 1992, Baker, Chung 1992, Van de Ligt 2002. Results showed that treatments with energies 3000-2900 kcal / kg diet crude protein level in the diet is 14-16 percent, the growth rate of pigs increased by 4.31 percent F2 hybrids
reduce satellite feed and forage 4.71 percent 5.97 percent while reducing feed costs 4.74 percent compared to treatments with energy levels 2900-2800 kcal / kg feed in the same age period. Quality lean meats tend to rise when the energy exchange in reasonable portions. However, the amount of which was not statistically significant and did not affect the chemical composition of meat. Thus, cross-bred wild boars are breeding sold commercially in wild conditions in Thai nguyen is the 3000-2900 kcal metabolizable energy and protein 14-16 percent rate corresponding stages of growth and fattening ration is has reasonable match actual conditions, the growth of pigs and economic efficiency.