Application segmentation categorizes demand by animal species, reflecting distinct nutritional requirements and production scales. Poultry accounts for the largest share, estimated at 35%, because biotin supplementation improves hatchability, feather quality, and metabolic efficiency, which are critical in high‑turnover broiler operations. Swine follows with approximately 30% of usage, where biotin supports reproductive performance and lean tissue accretion in both sows and market hogs. Aquaculture, representing 15%, benefits from biotin’s role in lipid metabolism, enhancing growth rates in shrimp and finfish cultures. Cattle, also at 15%, utilizes biotin to promote hoof health and milk production in dairy herds, though dosage regimes differ markedly from monogastric species. The residual 5% comprises niche sectors such as pet food, horses, and exotic species, where premium formulations drive adoption despite limited volume. This application‑focused taxonomy clarifies how each sub‑segment contributes to the aggregate market size and informs strategic allocation of R&D and marketing resources.