Which element is NOT included in the evaluation of milk production?

The evaluation of milk production in dairy cattle typically focuses on factors that directly influence the quantity and quality of milk produced. Daily milk yield, somatic cell count, and feed consumption data are all critical components of this evaluation.

Daily milk yield measures the volume of milk produced by a cow in a day, which is a primary metric in assessing milk production efficiency. Somatic cell count is an important indicator of milk quality and udder health, where high levels can suggest mastitis or other infections that affect production and quality. Feed consumption data is crucial as it directly relates to how much nourishment a cow receives, impacting her overall health, milk yield, and the nutritional quality of the milk produced.

On the other hand, temperament of the dairy cow, while relevant to management and welfare, does not directly affect the cow's milk production capabilities. A cow's behavior may influence handling and maintenance practices, but it is not a measurement that correlates with the quantity or quality of milk produced. Therefore, temperament is the element not included in the evaluation of milk production.