Dr. Nightingale Races the Outlaw Colt

Veterinarian Deirdre Didi Nightingale knows what made Aden Fox's cows sick. They wandered through a broken fence and grazed on poisonous Perilla Mint. What mystifies Didi is what smashed the fence: horse's hooves. There are no wild horses in Hillsbrook, New York... are there? Didi knows she didn't imagine the dappled gray colt she spied galloping across a country road. But when a Hillsbrook police officer is shot, she forgets about the runaway horse ... until she uncovers a clue that connects the colt to the murder.