The objectives of this book was to show the breed acceptance by evaluating the productive and reproductive performance of Dorper sheep crosses. In line with this the book was also indicate the intervention of supporting farmers through income enhancing technology is a targeted intervention in rural areas in Ethiopia. Accordingly, this intervention of delivering Dorper sheep, improved breed was intended to enhance rural farmers' income. However, lack of recorded data on the performance of sheep breed and all aspects of management, lack of regular sheep health program and market information makes it difficult to assess the importance and contribution of the past attempts to improve the sector. As a result, on-farm monitoring involves monitoring the productive and reproductive performance of a breed on selected representative households based on improved exotic sheep breeds. Periodic monitoring of the population dynamics and flock structures of a breed is also suggested for the purpose of assessing the risk status of a breed.