Abstract
An experiment was conducted to study the effects of flavomycin, O-tetra-45 and tylosin premix at the Poultry Experiment Station, University of Agriculture, Faisalabad, using 84 day-old Hubbard broiler chicks over a period of 8 weeks. The results revealed statistically significant weight gain, feed consumption and feed con-version ratio due to feeding different antibiotics as feed additives. Weight gains per chick for flavomycin, O-tetra-45, tylosin premix groups and control group were 1798.59, 1945.73, 1622.74 and 1466.53 g respectively, whereas total feed consumed per chick was 4522.33, 4781.33, 4155.00 and 3959.33g respcctivcly.The most efficient feed conversion ratio (2.45) was found in O-tetra-45 group whereas control group showed poor feed conversion ratio (2.69). The group fed 0-tetra-45 showed maxi-mum profit, whereas the least profit was observed in control group.
