This study sought to: determine the effects of prebiotics on the daily gain, gain in weight and feed efficiency of broilers; Evaluate the feed cost to produce a kilogram broiler; Determine the morbidity and mortality rates among treatment groups; Determine the digestibility of feeds; Evaluate the consistency of manure and urine output; and to Assess the economics of adding prebiotics in broiler production. One hundred fifty broilers were randomly distributed in five treatments and replicated three times with ten birds per replicate given the following treatment diets: Treatment 1 no prebiotics; 2% prebiotics; 3% prebiotics; 4% prebiotics; and 5% prebiotics. The average initial, final, weekly weights and gain in weight did not differ significantly (P> 0.05%). Feed consumption and feed efficiency did not differ significantly (P >0.05), Feed cost to produce kilogram broiler in Treatment 1 was lower than those given 2-5% prebiotics (P> 0.05%) (P >0.01). Mortality and morbidity rates did not differ significantly (P >0.05). Broilers fed 2% prebiotics obtained the highest mean of 27.48% for consistency of manure and highest protein digestibility of 50.49. Broilers given 2% prebiotics had the highest net return of Php. 1052.

Keywords : Broilers, Prebiotics, Feed Efficiency, Digestibility, Growth