The dairy farming has significant contribution to the Goiás state's
economy. In this activity, it is essential knowledge of production costs, as
producers are price takers. Among the costs of milk production, the most
representative are the costs of feeding the flock. One strategy that can be effective
for reducing feed costs is the grouping of the flock which aims to reduce the
variability of the nutritional requirements within groups. The objective is to present
a possibility of dairy cattle grouping by cluster analysis method,through a case
study on a farm located in Goiás . Through the non-hierarchical method K-means ,
were formed three clusters with similar arrays within each cluster and dissimilar
from other matrices of the other clusters.