The weanling heifers, called "the heffies" so as to distinguish them from the yearling heifers, are kept near the barn for several weeks. The corral fences are more secure than wire ones, thus preventing an unnecessary cow-calf re-weaning.
Besides, feeding and visiting the heffies regularly is great public relations. Friendly heffies generally grow up to be sweet-tempered cows.
Remember when Angel gave us cute little Gabriela this spring?