Waste from the agro-industrial complex is characterized by a high content of carbohydrates, proteins and fats, which makes them indispensable for balancing diets. In this regard, a method for obtaining a feed product based on cellulose-containing waste enriched with microparticles and probiotics is proposed. The method is based on ultrasonic processing of connective products (bran) and mineral complex. The resulting product is effective in feeding animals as a mineral-probiotic supplement.