The first foal by two-time Horse of the Year Curlin was euthanized on Jan. 29 after suffering a paddock accident days earlier.
The filly out of the Hawkster mare Zophie was born at Lyn Burleson's Burleson Farms in Midway on January 12. Burleson said that the accident happened on Jan. 24 and that the filly's injuries "just couldn't be brought around.
"It's just a terrible thing," added Burleson, who did not disclose the exact nature of the foal's injuries.
The filly was a half sister to Grade I winner Appealing Zophie.
Burleson said the mare Zophie was slated to be bred to WinStar Farm stallion Tiznow this season.