In the paper are presented the results of scientific investigations regarding the use in the diet of young chickens of Adler Silver breed aged one day, of Streptomyces Biomass, which represents a biologically active preparation of microbiological origin, and which is obtained from apatogenic streptomycetes such as Streptomyces Fradiae CNMN-Ac-11, extracted from the soils of the Republic of Moldova. The investigations were carried out within the project 20.80009.5107.12 ” Strengthening the "food-animal-production" chain by using new feed resources, and innovative sanitation methods and schemes”, which are organized and carried out within LLC "Avicola Saratenii-Vech" located in Saratenii Vechi village, Telenesti district. The research was carried out on a batch of 100 chickens, randomly distributed in two groups of 50 chickens in each, one of which was a control group and another was a experimental group. The time duration of the investigations was 7 weeks. It was established that at the end of the investigations the live mass was higher in the experimental group of chickens whom were administered Streptomyces biomass in propoirtion of 0.1% and who recorded an increase of 5.1% in live weight compared to chickens from the control group. The indices of the specific consumption in this group of chickens were lower by 9.3 % compared to the chickens in the control group.