Obtaining enough food for survival is a fundamental challenges in most of the developing countries. The livestock sector is of paramount importance to sustain the agrarian production, where mixed farming system is practiced. The possibility of increasing the consumption of animal protein in such countries requires an acceleration of the livestock's productivity. One of the most feasible solutions in this regard is to enhance the efficiency of livestock farmers where intervention of development projects play decisive role. This book presents a stringent analyses of such interventions on socio-economic and environmental aspects at households level. The major issue is to isolate the impact on innovation in smallholder peasants, food self-sufficiency, natural resource management, institutional development, gender equity and production efficiency due to such intervention, and its overall effect on the living standard of beneficiaries and other stakeholders of the community. Besides, spillover impact was considered in terms of physical changes due to combined effect of activities transferred into the periphery as percolation. A With-Without project evaluation approach was applied as a research methodology. The findings are based on the primary information collected through household survey. The collected cross sectional information was analyzed using descriptive statistics, econometric models and qualitative analyses. The empirical findings obtained from such analyses confirm a substantial contribution of a project intervention as long as the activities are institutionalized for the sustainability of the accrued benefit over time.