LEXINGTON, Ky. - Keeneland and Fasig-Tipton have changed their November sales dates, citing a desire to make the sales as convenient as possible for buyers and sellers who plan to attend the Breeders' Cup in California on Nov. 6-7. Both companies also have trimmed their auctions' days, a sign of the economic times as many mare owners opt not to sell in a Thoroughbred market that is down roughly 25 percent even at its top end.