The Forgotten FillyPaperback - 1998
Joelle has a very special relationship with her Thoroughbred mare, Dance Away. Then Dancer dies giving birth to her first foal, and Joelle swears that no horse, not even Dancer's filly, will ever replace Dancer in her heart. But Joelle's parents insist she take care if the orphaned filly--it needs her help to survive.
Joelle does as little as she can to groom and train the foal. All she can think about is Dancer--that they won't be riding together in the big fall show where Joelle was sure they'd win a trophy. Joelle's convinced that Dancer's filly will never be a winner like her mother.
Then something happens that will make Joelle change her mind forever...