The objective of this experiment was to evaluate the diets digestibility in broiler chickens with and without antibiotic and probiotics, in the initial phase (one to 20 days) and finish phase (21 to 40 days). Chickens distributed in a completely randomized design were used in four treatments: Treatment 1- Control diet; Treatment 2 - Control diet + 0.02% probiotic 1 (Calsporin 10®), Treatment 3 - Control diet + 2.0% initial phase and 0.63% finish phase probiotic 2 (Estibion aves®); Treatment 4 - Control diet + 0.013% of antibiotic (Bacitracina de Zinco®), and five repetitions, with ten and eight birds, respectively, were used in each experimental unit, which were kept in metabolism cages. The results demonstrate that the digestibility of dry matter, nitrogen and apparent metabolized energy were not affected by the supplementation of antibiotic and probiotics in the broiler chickens diet.
antibiotic; digestibility; chickens; probiotics
