In this study, we confidently evaluated the effectiveness of using infrared spectroscopy for assessing silage, and observed the results obtained with portable equipment. Several factors alter this ensiled material's composition and quality, and monitoring is necessary to create an accurate diet formulation. Analysis using near-infrared spectroscopy (NIRS) this technique is the wavelength of the near-infrared region and measuring the difference in the amount of energy emitted by the equipment and the energy reflected by the sample to the detector, be measured by different bands create a spectrum of this sample. In the nutrition of ruminants, mainly confined animals, silage is the main source of fiber used in their diet and the NIRS technique has been widely used to evaluate its chemical composition the digestibility, within other parameters. Use with benchtop equipment in the laboratory or with portable equipment offers real-time results on the farm, allows diet variability to be monitored, and assists in decision maki. However, further research into the use of this equipment to assess its accuracy and which type of equipment is best to use is recommended.