Grade 2 winner Cairo Prince, an early favorite on the 2014 Kentucky Derby trail, has been retired from racing and will make his stallion debut during the 2015 breeding season at Airdrie Stud in Midway, Ky., for an advertised fee of $10,000.

Black Caviar, Australia’s three-time Horse of the Year, is pregnant with her second foal, this time by Australian champion Sebring, reports the Melbourne Herald Sun.

An 8-year-old daughter of Bel Esprit, Black Caviar delivered her first foal, an Exceed And Excel filly, on Sept. 12. The mare’s ownership team said that it would retain Black Caviar’s first foal for racing.

Darley announced its 2015 North American stallion roster and fees on Monday, headlined by multiple Grade 1 winner and veteran sire Medaglia d’Oro, whose fee has been raised from $100,000 to $125,000.

Medaglia d’Oro, a 15-year-old son of El Prado, currently ranks seventh on the North American general sire list by progeny earnings. His leading runners this year include Grade 1 winners Coffee Clique and Lochte, and he has three horses pre-entered in this weekend’s Breeders’ Cup races. He is best known as the sire of 2009 Horse of the Year Rachel Alexandra.

Magician, winner of the 2013 Breeders’ Cup Turf, will retire after his start in this year’s edition on Nov. 1 and begin his stud career next year at Coolmore’s Ashford Stud in Versailles, Ky., with a fee to be announced.

Family ties run deep in the Bluegrass.

Legendary Thoroughbred operations, the likes of Claiborne and Darby Dan, continue to seamlessly raise top-flight runners as they pass from hand to hand through the years, new generations being born into the business. Great sires continue their dynasties through their sons and grandsons; the line passing from Bold Ruler to Boldnesian to Bold Reasoning to Seattle Slew to A.P. Indy …

There are few lines of black type that can do more to boost a broodmare prospect’s résumé than a win in the Breeders’ Cup Distaff.

The list of Distaff winners includes some of the most important female runners of the past three decades. However, while a victory in the Breeders’ Cup may open doors in the sales ring and the stud barn, it has not guaranteed a bountiful career as a broodmare. Measured by success in the breeding shed, the spectrum of Distaff winners ranges from Broodmares of the Year to outright disappointments.

Mr. Besilu, who sold for $4.2 million as a yearling, has been retired and will enter stud at Eureka Thoroughbred Farm in Fredericksburg, Texas, for 2015. His fee has been set for $2,000, the farm announced on Friday.

From one point of view, we should never be surprised when a horse just below top class as a racehorse becomes a top-class stallion. We know, after all, that genetics accounts for only 35 to 40 percent of racing ability, which means that environment, how and where the horse was raised, trainer and grooms, pushy or laid-back owners – in short, everything else you can think of – accounts for the other 60 to 65 percent of the ability expressed in a horse’s race record.

J. Kirk and Judy Robison are standing at the threshold of what could be an unforgettable week for their breeding and racing operations. The couple has five homebreds in four stakes on the $2 million New Mexico Classic Cup card at Zia Park on Sunday, while their Mico Margarita is revving up for a start in the Grade 1, $1.5 million Breeders’ Cup Sprint at Santa Anita on Nov. 1.

WinStar Farm has acquired a half-interest in Grade 1 winner Daredevil, in partnership with owner Let’s Go Stable.

The 2-year-old son of WinStar Farm stallion More Than Ready is undefeated in two starts, most recently winning the Grade 1 Champagne Stakes at Belmont on Oct. 4. He is scheduled to make his next start in the Breeders’ Cup Juvenile on Nov. 1 at Santa Anita. WinStar also co-owns another top Juvenile contender in Grade 1 Breeders' Futurity winner Carpe Diem, also owned in part by Stonestreet Farm. Both colts are trained by Todd Pletcher.