Reduced pasture quality and acreage has resulted to poor animal products and low farm inputs. The newly introduced grass cultivars from the Americas. The Brachiaria grass cultivars re-introduced from Brazil demonstrated that more milk output result in improved animal products. Grass cultivar suitability evaluation continues across the different agro-ecological zones of Kenya. Most local pastures are less nutritious and are not tolerant to fast changing climatic variabilities in the marginal agro-pastoral regions of Kenya.