Increasing levels of Tra fish oil (TFO) were added diets of native chicken (Noi) in Vietnam to determine effects on growth and carcass quality traits. One hundred and fifty Noi chicken at 28 days of age (293±1.10g/bird) were arranged in a randomized design with five treatments and three replicates. The treatments were (TFO) levels of 0, 2, 4, 6 and 8% of the diet (DM basis) corresponding to TFO0, TFO2, TFO4, TFO6 and TFO8 treatments with 10 chicken per experimental unit.

Increasing the level of Tra fish oil led to curvilinear responses with optimum values at 6% oil for: (i) a reduction in feed intake; (ii) and improvement in growth rate and in feed conversion; and (iii) a high per content of breast and thigh muscle in the carcass

Key words: carcass traits, catfish oil, Noi chicken, supplementation, weight gain