Guard. Tracker, #2

Never admit to seeing ichur, the silvery residue of magic spells. Not if you want to stay under the radar of the Councillors of Convane. On their last boundary ride before winter, Dallas and Misty discover sick sheep. While Dallas and his tracker horse, Swift, use magic to heal the sick sheep, Misty and her tracker horse, Sweetie, help gather the rest of the flock. At sunset, when Misty does not return, Dallas and Swift search for her and the missing flock.
He finds two dead slavers and an injured shepherd. The rest are missing and their tracks are magically hidden. Swift sniffs out a trace of magic residue, so Dallas follows, intent on rescuing Misty and the shepherd's family. Guard continues the adventure where Rider ended, including mages, dragons, tracker horses and magic spells.