Joking will likely miss the Nov. 5 TwinSpires Breeders' Cup Sprint (gr. I) because of a fever, owner and trainer Charlton Baker said Oct. 31.
Songbird will not participate in the Kentucky Oaks (gr. I) because of a low-grade fever, trainer Jerry Hollendorfer said April 17.
Longines Breeders' Cup Distaff (gr. I) contender Untapable was withdrawn from the Oct. 30 race for fillies and mares the morning of Oct. 27 after the champion 2014 Distaff winner spiked a temperature.
The 5-year-old racemare's white blood cell count was only slightly elevated, and the 101.3 degree temperature she had in the early morning hours of her first day in Kentucky was likely caused by shipping.
Champion racemare Beholder missed her first day of training for the Oct. 31 Breeders' Cup Classic (gr. I) at Keeneland Oct. 20, when she spiked a slight temperature after shipping from California to Kentucky Oct. 19.
Lambholm South Holy Bull (gr. II) winner Upstart was scheduled to breeze the morning of April 11 at Rick Violette's Palm Meadows base in Boynton Beach, Fla., but the workout was postponed when the colt developed a fever.
Two days after winning the Haskell Invitational (gr. I), Zayat Stables' Paynter remained at Monmouth Park with a slight fever that prevented him from shipping back to trainer Bob Baffert's base in Southern California.
Slew's Tiznow has been scratched from the Bessemer Trust Breeders' Cup Juvenile (gr. I) because of a fever. The colt is the third 2-year-old Breeders' Cup contender to be scratched since Oct. 24 due to fever.
Trainer Todd Pletcher reported this morning that Rags to Riches, the first filly to win the Belmont Stakes (gr. I) in 102 years, has had her temperature drop to normal levels and will likely head back to the track Aug. 30.
A few cases of Potomac horse fever occur each fall in Kentucky. This year, a few cases have been seen, but they occurred a little earlier than normal. Dr. Nathan Slovis, of Hagyard Equine Medical Institute, said the early occurrence probably was due to the dry weather the past month.
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