Poor little Hailey. Sounds scary for them. I guess it could be a bonding experience, get her used to you. I remember trailer practice with the foals. We would put the trailer in the pasture with the ramp down and lure them in for treats to get them used to it. Worked okay, but they still didn't like going in as they got older. Granted, we didn't take them anywhere much. Just if they were sold.