Livestock is a strategic sector in West Africa and the Sahel, both in terms of the size of its livestock population and production, as well as in terms of the importance in the livelihoods and food security of millions of households. Historically, ruminant husbandry systems are characteristic of the economies and management of the vast arid Sahelian spaces and they form a central element of the culture of the families of pastoralists, sedentary livestock breeders and sedentary agro-livestock breeders. But livestock farming is above all an illustration of the potential offered by the valorisation of the region's agro-ecological complementarities, which makes it the first vector for the integration of economies and territories through a system of complex exchanges. This system, which makes it possible to cope with the variability of natural resources, organizes synergies between agricultural production systems and livestock systems, is a vector of links and dialogue between communities. Finally, it helps to supply the animal protein deficit markets of the coastal countries.