Professional horse trainer Ginger Gaffney got an unusual call for help about eight years ago. It was from a ranch near her home in Northern New Mexico that serves as an alternative to prison. The ranch was having horse troubles. Gaffney stopped by and was astounded at what she found. She wrote about it in her memoir “Half Broke.” Gaffney and Ayla Jarvis, a former resident of the ranch, spoke with Andrea Dukakis.