They often steal cattle from each other, and clash over grazing rights and access to water points.
It's unclear what triggered the latest clashes, but the two groups have fought for years over grazing rights, land and water sources.
But human factors have also played their part, with over-grazing, over-farming, misuse of irrigation and the unsustainable demands of a growing population all contributing to environmental degradation.
This remains a very real concern, with much of the world suffering from increasing water scarcity, land erosion, drought intensity, stalled progress on crop productivity, declining groundwater aquifers, over-grazing of pasturelands, tropical deforestation, massive species extinction, over-fishing, and anthropogenic climate-change.
They say that the area is environmentally damaged anyway, thanks to drainage and over-grazing, and that the new wind farms would have only a minor impact.
Settled Pokomo farmers and semi-nomadic Orma pastoralists have clashed intermittently for years over access to grazing, farmland and water in the coastal region.
Pacific Hydro already runs Australia's largest wind farm, a 35-turbine, 52-megawatt development that is spread over a number of grazing properties at Ararat in western Victoria.
About 70 million years ago, during the Cretaceous period, Lenny and a bunch of friends snuck out of the house to go tip over some Hadrosaurs that were grazing in a field in modern-day Mongolia.
Only about 35 cows are needed over the winter months to continue grazing a small part of the protected land.
And the best of times this is not: The ill effects of a years-long drought have been exacerbated by the tradition of grazing herd animals indiscriminately over a large region, so that topsoil never replenishes.
While the Golzernsee hike does not end with edibles, it does lead to a 6km hike over chalet-strewn meadows, where the clanging bells of grazing cows echo across valleys.
Land use has also changed over the last 10 years including a big fall in the number of sheep grazing the land.
BBC: Snowdon getting 'warmer and wetter' says 15-year survey
According to Shannon Horst, CEO and co-founder of the Savory Institute, ranchers can consistently double, and even quadruple livestock capacity over time. (See an article in TIME for more on the Savory grazing technique).
FORBES: Impact Investing in Sustainable Agriculture for a New Economy
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