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. Forty multiparous lactating crossbred Holstein x Gir cows, within 80 ± 7 DIM will be blocked by milk yield and BCS, and randomly assigned to one of four treatments on d0 …