Why are the pastoralists nomadic? What happened to Massai when they were confined to a place during the colonial rule?

(a) During drought, the pastoralists move to areas where forage is available. That is why, traditionally, pastoralists are nomadic” They move from place to place. This nomadism allows them to survive bad times and avoid crisis.
(b) They were cut off from the best grazing lands and forced to live within a semi-arid tract prone to frequent droughts. As a result of restrictions, large number of Maasai cattle died of starvation and disease in these years of drought. There was a steady decline of the animal stock of the pastoralists. An enquiry in 1930 showed that the Maasai in Kenya possessed
7,20,000 cattle, 8,20,000 sheep and 1,71,000 donkeys. In just two years of severe drought, 1933 and 1934, over half the cattle in the Maasai Reserve died.