This experiment was conducted to determine the effects of vitamin A supplemental level on growth performance,antioxidant parameters and meat quality of yellow-feathered broilers aged from 43 to 63 days.One thousand and eighty male broilers aged forty-three days were randomly assigned to six dietary treatments.Each treatment consisted of five replicates with 30 birds per replicate.Dietary treatments included a basal diet(control,containing 208 IU/kg vitamin A) supplemented with 0,750,1 500,3 000,6 000 and 12...