Probiotics are microorganisms and proteins that provide health benefits when consumed. This document discusses the application of probiotics for poultry, cattle, and sheep. Probiotics improve performance and productivity in poultry by maintaining digestive microflora and reducing pathogens. In cattle, probiotics prevent and combat digestive disorders, influence rumen metabolism, and stimulate rumen microorganisms. For sheep, probiotics help correct bacterial imbalances, provide energy, and reduce recovery time from stress or disease.