An on-farm feeding experiment was conducted to determine the effects of Tra fish fat by-product (MC) supplementation at 0, 2, 4 and 6 % in the diets for Noi chickens. Three hundred and twenty chickens (mixed-sex) at 4 weeks of age were used in a completely block design and devided into four householders with 4 treatments/householder. Eighty chickens/househoder (balance male and female) were designed in 4 treatments (MC0, MC2, MC4 and MC6) used for 12 weeks then slaughter to evaluate the meat quality. Average daily gain were significant differences for birds fed diets with higher levels of MC, feed intakes slightly reduced when increasing MC in the diets. As results feed conversion ratios were lower in MC6 to compare with MC0 and MC2 for both periods (4-8 and 9-16 weeks of age). The carcass weight and subsequent dressing percentage increased slightly with increasing MC levels. Howervers, thigh and breast percentages were non significant differences. There were higher EE content and polyunsaturated fatty acids (PUFA) such as linolenic acid (C18:3), eicosapentanoic acid (EPA), docosa-hexanoic acid (DHA) and docosa-pentaenoic acid (DPA) of breast meat when increasing MC supplementation in the diets.

Key words: Tra fish fat by-product, Noi chicken, householder, Mekong Delta.