Fungal feed additives, derived from fungi such as Saccharomyces cerevisiae and Aspergillus oryzae, have garnered significant interest for their role in enhancing animal nutrition and health. These additives are rich in bioactive compounds such as enzymes, prebiotics, and antioxidants, which improve digestive efficiency, strengthen immune responses, and support overall growth in livestock. By optimizing nutrient absorption and promoting gut health, fungal additives enhance feed conversion ratios and animal performance. Their antimicrobial properties help reduce pathogenic infections, contributing to better animal welfare. Additionally, fungal feed additives mitigate the harmful effects of mycotoxins—common feed contaminants—thereby improving feed safety. Research indicates that incorporating these additives into animal diets can reduce the need for antibiotics, aligning with global efforts to combat antibiotic resistance. This not only supports sustainable animal husbandry but also addresses public health concerns. However, the effectiveness of fungal feed additives can vary based on fungal strains, dosages, and animal species, highlighting the need for further research. A deeper understanding of their mechanisms of action is crucial for developing targeted and reliable supplementation strategies. Despite these challenges, fungal feed additives offer a sustainable solution for improving livestock productivity while delivering economic and environmental benefits, paving the way for advancements in modern animal husbandry.