Stan-when my horse bolted out of the trailer after throwing up his head-I was a basket case. It was the first trail ride after getting him & my friends had left (for the restroom),& I didn't even think there would be a problem. So, what our consensus was -I slipped into the trailer, the door was closed-I would untie him, calmly turn him & walk to the rear-stop, & when he was calm, have friend open the door wide & we would step down. This worked great. Didn't use any treats, just remained calm & didn't give him a place to bolt to. He came around quickly & loads & unloads very well now. My trailer is stock type, slant load, 4 horse, so plenty of room. This solution won't work for straight loads.