Significant cultural change also occurred. Guarding cattle on the plateaus depended less on elaborate defenses and more on mobility and cooperation. Both of these requiring new grazing and herd-management strategies. The practice of the later Kalenjin – that is, after they had abandoned the Sirikwa pattern and had ceased in effect to be Sirikwa – illustrates this change vividly. On their reduced pastures, notably on the borders of the Uasin Gishu plateau, when bodies of raiders approached they would relay the alarm from ridge to ridge, so that the herds could be combined and rushed to the cover of the forests. There, the approaches to the glades would be defended by concealed archers, and the advantage would be turned against the spears of the plains warriors.