The International Federation of Organic Movements (IFOAM) has established four fundamental principles which underpin organic farming. One way of achieving these principles is the use of integrated crop-livestock systems, which is very common for well-balanced organic systems with animals. This chapter reviews types of such systems, with a focus on agroforestry systems, their potential environmental and economic benefits, their contributions to animal health and welfare, as well as challenges in implementing and managing such systems whilst ensuring a high animal health and welfare level.