A number of diseases and production problems have been observed in grazing ruminants in many countries around the I world Some of these problems and health effects have been attributed to dietary imbalances in mineral supply and appear \ to be geographically distributed. Grazing cattle require different levels of minerals in their diet depending on the stage of class of development; young and growing, lactating or pregnancy. Common findings indicate that the lactating and young} and growing animals are the most vulnerable to mineral problems, thus providing a sufficient ground for their choice in\ experimental studies. In this preliminary review of the project, the nutritional status of cattle grazing on a range of farms in \ Irons Nzoia District are assessedfrom the mineral content of blood from young and growing as well as lactating animals] sampled during the dry and wet seasons of the study period. Data -will be evaluated in terms of established criteria normality.