Evaluation of the nutrient utilization in starter broilers fed corn based diets added with different exogenous enzymes.

I congratulate the research team for their work. Without restrictions to the study that was developed, I would like to make a general consideration of a possible indirect influence of enzymes, which is their action on the animal microbiota. It is well known that the non-starchy polysaccharides, present in the food ingredients, are generally fermentative substrates used by the microbiota, with an often negative action. Therefore, a relevant utility of enzymes would be their action on the structure of polysaccharides by transforming them into oligosaccharides that, in turn, can benefit the microbiota. We understand this effect is extremely important considering the fundamental influence that the microbiota has on animal performance. Even this action can be used to partially support the improvement in nutrient digestibility of food, as found in this study.