This document summarizes a study on the use of volunteer farmers (farmer trainers) to disseminate dairy feeding technologies in Kenya, Uganda, and Rwanda. The study found that over 2,000 farmer trainers have been recruited across the three countries. Farmer trainers cover long distances on foot or bicycle to conduct training sessions and have trained thousands of farmers. While the approach provides benefits like knowledge gain and social status, farmer trainers also face challenges like transportation costs and high farmer expectations. The study recommends providing incentives and support to farmer trainers to improve the sustainability and effectiveness of this voluntary extension approach.