Dr. Robert Hunt discovered the injury during a nuclear scan examination of the filly on Saturday at Lexington Hagyard-Davidson-McGee equine clinic, trainer Frank Brothers said.
"She's got a hairline fracture of the hip," said Brothers. "The prognosis for recovery is 100 percent, but she'll probably be out for about four months."
The daughter of Hennessy worked on Thursday, turning in a five-furlong breeze in :58 3/5 that ranked as the fastest of nine works at the distance on the day. It was her second work since the April 30 Kentucky Oaks and both had been brilliantly fast. But Brothers saw something in Madcap Escapade that he was not comfortable with.
"It probably started in the Oaks, although you couldn't really detect it," he said. "She trained well, but she just wasn't a hundred percent -- it's such a fine line. But we sent her over yesterday to get her checked out and thank God we found it. She's going to be fine, she'll be a hundred percent -- but she's pretty much done racing for the year."
Madcap Escapade dazzled racing fans when she opened her career with a 10-length victory in a maiden race at Gulfstream Park on Jan. 4. She followed that victory with an 11 3/4-length romp in the Old Hat Stakes and a 4 3/4-length win in the Forward Gal (gr. II) over the same track. She made a successful debut in grade I company when she defeated Ashado in Keeneland's Ashland. She suffered the first loss of her career when she ran third to that rival after setting the pace in the Oaks.
Brothers said Madcap Escapade would get 60 days of stall rest and then would be turned out on a farm for 60 days. He said that fans should get the chance to see the speedy filly back on the track next year.
"She just needs four months off, then we'll put her back in training, said Brothers. "Bruce intends to run her next year. We don't have any timetable, but she'll probably be ready for winter racing at Gulfstream after the first of the year, or thereabouts. Then we'll look for having a good year with her next year."