As the saying goes, you only get one chance to make a first impression. While many stallions have a few foals from their first crop sell as weanlings, the first chance to make a big impression comes when members of that initial crop are offered as fully developed yearlings.
By then, the stallion has stood for three years. At a time when many buyers have a “What have you done for me lately” mentality, he must show some action in the sale ring and, subsequently, on the racetrack. If he does not, he is not long for the stallion barn − at least not the same stallion barn.