At what stage of pregnancy should mares begin to receive increased energy in their diet?

Mares should begin to receive increased energy in their diet during the later stages of pregnancy, particularly around seven months. This is because fetal growth accelerates significantly in the last trimester, making higher nutritional demands on the mare's body. Starting from this point, the requirements for energy, protein, vitamins, and minerals increase to support the developing foal.

It’s essential to ensure that the mare is adequately nourished during this period, as nutrient deficiencies can lead to poor fetal development and complications during the birth process. Adjustments to her diet should be made gradually and with consideration of the overall health and condition of the mare, ensuring she receives a balanced diet to support her needs and those of the growing foal.