Phytogenic additives have been shown to act as a substitute for antibiotics because of their functionality in breaking up bacterial membranes, being effective in combating microorganisms and acting as antioxidants. Used in a strategic way, in promoting action, it will mainly favor the intestinal condition, increasing the zootechnical gains and increasing the prevention of pathologies associated with bacteria or fungi. Therefore, the aim of this review was to seek scientific information on what are the phytogenic additives, their compositions and mode of action and the applicability with the results obtained through their use in broiler feed. For this review an analysis was made of scientific studies that studied which are the main additives and their active principles, as well as their mode of action of essential oils and which plants have potential to be used as phytogenic additives, evidencing their effects on food. of broiler chickens. It is concluded that the use of phytogenic actives in the form of essential oils can be used in chicken feed, providing improvements in the intestinal health of birds and consequently improvement in their productive performance. Even if its positive points are shown, some conditions still need to be elucidated, such as dose / action relationship and association of the various active principles belonging to the phytogenic additives, which may provide several new studies.

Corn and sorghum are the main energy sources used in the diets of ruminants in our country. These two cereals have two characteristics that can hinder the absorption and use of starch by animals. They have two striking characteristics that hinder the absorption and use of starch by animals. The first is related to the consistency of the endosperm, classified as floury or hard, preventing the maximum use of the material, and the second is the protein matrix that covers the starch granules, functioning as an excellent physical-chemical barrier in the protection against weather conditions, problems harvesting and attacking insects and / or rodents. Processing over grains can be used as a way to improve the factors that limit their absorption, breaking the protein matrix that covers the starch granules, favoring the performance of digestive enzymes. The objective is to bring arguments and evidence on the efficiency of corn processing in the form of rehydration and silage, on aspects of ruminal degradability, improvement in feed conversion and increase in production. To this end, a review was carried out through scientific articles, analyzing the corn processing techniques and their performance in the productive characteristics of ruminants. Being able to conclude that the processing on the grain, can increase the nutritional value of corn with vitreous endosperm, improving the zootechnical aspects in the nutrition of ruminants.