Dry is expected to remain the largest form segment, accounting for 37.5% of the Probiotic Feed Supplements Market in 2026. Among sources, Microbial leads with a 35.0% share, while Poultry represents the largest livestock segment, accounting for 37.5% of the market. The competitive landscape includes prominent companies such as Cargill, ADM, and DSM-Firmenich, alongside Kemin Industries, Alltech, Novonesis, Adisseo, and Trouw Nutrition (Nutreco).