Work him when he comes out. As soon as he rushes outward, get him working when he gets out there. Then, when he builds up a decent amount of sweat, taking him up and load him in again, pet him, give him a cookie, love on him, etc. Let him stand and catch his breath, then ask him to back out again. If he rushes, repeat the process. Eventually he will learn the trailer is where he wants to be and will be less happy to leave it. Why would he want to rush backwards if it just means he's going to have to work?
When he steps out calmly, pat him and put him away.
It worked with several horses who I have been around. Particularly Bailey, my old barrel horse, who would violently pull back every single time she was unloaded from a trailer to the point of flipping over backwards, rearing and hitting her head, falling out of the trailer, etc. I'm glad I had access to the escape door for THAT mess.
I know a lot of people want to tip toe around a horse that has had fear problems, but the more you tip toe the more fearful they are going to become. Make them forget about their problems by giving them another focus.
Pssh.I didn't pick up the wrong lead
It's called a counter canter...
...A very advanced maneuver.
Last edited by SorrelHorse; 10-18-2012 at 03:43 AM.