Growth Performance and Immune Response of Free-range Chicken Supplemented with Different Levels of Spirulina (arthrospira platensis) in their Diet

The study was conducted to determine the effects on growth performance and immune response of free-range chicken supplemented with different levels spirulina in their diet. Sixty free range chicken, fifteen day-olds, were used which randomly distributed four treatments, three replicates each treatment five experimental birds replicate. Treatment 1- Control (pure commercial feeds); 2- 4% feeds; 3 -5% feeds 4 – 6% feeds. Initial final weight reveal that they are replicate significantly among treatments whereas Average Daily Gain Feed Conversion Ratio showed no significant differences however, exhibited efficiency feed conversion has highest gain treatments. In hemagglutination Inhibition test, all responded positive response.