It is called the Breeders' Cup for a reason. Yes, the commercial sector revolves to a neurotic degree around stallions, which is why the stakes are so high for the colts at Del Mar this weekend. But breeding those horses in the first place was at least as much about the mares, meaning that many of us will be no less engrossed by the auctions staged in Lexington immediately afterwards. By the same token, our curiosity about Incredibolt--who last weekend stole a march on his peers lining up for the...