Abstract
The objective of this study is to evaluate the influence of the energy source of the diet and chromium supplementation on serum concentrations of glucose, insulin, and non-esterified fatty acids (NEFA) on lactating cows. Cows receiving in a 2 × 2 factorial arrangement design: 1) concentrate based on ground corn (CRN; n = 20) or fat (GP; n = 20), and 2) supplemented (n = 20) or not (n = 20…