The Blue Roan Child - Jamieson Findlay

An orphan girl  named Syeira helps out at the stables. Her favorite horses are the Arva horses.  One day Arwin's colts are taken by Lord Ran.  Syeira decides to help Arwin get her colts back.  

I could not stop reading this book.  It is explained so well that I could imagine what was happening. Throughout the book its written like historical fiction but towards the end it becomes more fantasy.