The limited availability of quality feed during the dry season and the underutilization of agricultural waste are the main challenges faced by smallholder livestock farming in Kapedi Village, Sumenep Regency. This research and community service aimed to enhance farmers' knowledge, skills, and independence in processing agricultural waste into fermented feed, as well as to optimize the efficiency of livestock business management. The methods employed a participatory approach through education, demonstration plots for producing anaerobic fermented feed based on corn stover, training on cash flow and cost of goods sold (COGS) financial recording, and collective marketing assistance. The results indicate that the application of anaerobic fermentation technology significantly improves the nutritional value, digestibility, and palatability of the feed, while reducing production costs and maintaining a continuous feed supply throughout the year. Beyond improving operational efficiency, this program successfully fostered ecological transformation through waste utilization (zero waste), established fostered farmer groups as new social institutions, nurtured local leaders, and strengthened farmers' bargaining position in collective marketing. These findings confirm that fermentation-based agricultural waste processing and the strengthening of business management are effective in achieving the sustainability and independence of smallholder livestock farming.