During this period of constant movement of people and animals within Africa, some of these sanga cattle probably intermixed with the short-horned, thoracic-humped cattle to produce the thoracic-humped sanga. The latter may have migrated, most probably along with the spread of Islam, westerly to constitute what are today the lyre-horned cattle of West and Central Africa, including the Fulani cattle. Originally the White Fulani were indigenous to north Nigeria, southeast Niger and northeast Cameroon, owned by both Fulani and Hausa people. They then spread to southern Chad and western Sudan.