Problem: A horse who has trailered before, now once she's half on rears backward violently and hits her head on the top edge of the door.
It's just been this year when she's ready to show that she's developed this issue.
She'll even load half in the trailer without much fuss, but as soon as her hind end is close to being in, she has the big reaction.
Based on your description, this sounds like something that has started happening suddenly. In my mind, whenever there is a SUDDEN change in behavior, I look first to finding a reason for PAIN.
How old is your horse?
What events do you show her in?
Does she have any possible rear end lameness with hocks or stifles?
In this case, that would be the first avenue I would explore. Something seems to be causing a severe reaction from this horse when you ask her to step up into the trailer with the hind end.
I would also fully examine your trailer. For example, there have been cases of electric shock to horses in the trailer due to faulty wiring. So I would have your trailer checked as well that might explain a sudden change in behavior.
What I've tried: 1) Asking her to go in, if she refuses, I go work her away from the trailer for several minutes to show her the trailer is a rest. Can do this for hours and hours on end with no progress. 2) Working her around the trailer, then showing her inside is the rest. 3) Asking for only a step at a time and giving reward when she does so.
Once you have ruled out a pain issue, you can go about re-training.
Of course, schooling a horse for
hours and hours on end isn't helping you or your horse. That's way past the frustration level for the both of you.
I've made a post in the past about trailer loading, because that was easier than retyping over and over. I suggest you read it over.
Trailer Loading 101
I too am a fan of SENDING the horse onto the trailer. However, it's more than just that, or just leading. It's about having complete control over your horse's feet and body. If you have true control over their feet, you can send or lead them anywhere.
With a severe issue like yours (again, assuming you rule out pain), expect this re-training process to take several weeks before you ever even ask your horse to load those back feet onto the trailer.
With a 3-horse slant load trailer, I personally like to send the horse on the trailer, close the divider behind them, then close the back door, and THEN go around to the window to tie them. (Do in reverse when you are unloading.)
Can you park the trailer in her paddock/field and leave it open? Maybe even feed near it and slowly day by day move the food inside until the trailer is not a big deal to her?
Personally, I think this method is
useless because you are not fixing the root problem. Usually, it's not the trailer that is a big deal at all -- it's a ground work issue (or possibly a pain issues, as mentioned above)
Okay, now I got my answer, don't haul her in a straight haul trailer, it's brutal on her. To rehabilitate this horse to loading and hauling again, use an open stock trailer and let her ride how she wants.
Straight load trailers are not brutal.
The type of trailer has nothing to do with it.
Don't mean to get too far off topic, but if you remove the dividers (I'm thinking about doing this), there is no butt bar. Now the trailer I'm using has a rear ramp, but it is solidly held shut on both sides, so there's no danger of Harley kicking it open until I unfasten it. But is it safe to haul a horse without a butt bar?
I have a 3-horse gooseneck slant trailer. It came with a butt bar for the back stall. I don't use it.
I usually put Red in the back stall. He's a good traveler. He self-loads and self-unloads as I instruct him. We put a lot of miles on the road and I've never had an issue not using the butt bar. I also don't tie him.
With my trailer, there is no way the door can come unlatched while driving. However, there are trailers out there that could based on how their doors fasten shut .... if I had one of those, I would absolutely use that butt bar. So I would say it depends on your horse and your trailer.
I think ramps on horse trailers are a hazzard.
I agree with you on that.
I had always wanted a trailer with a ramp because I thought it would be nicer for the horses. I even seriously considered putting a ramp on my trailer when I bought it, but I didn't want to dish out the $1,000+ to do it at the time.
Now I am glad I didn't. I've seen so many stories of injuries
due to ramps. Horses slipping off the side of the ramp -- or slipping on the ramp itself -- or heaven forbid, getting a foot caught in the space where the ramp attaches to the trailer.
So I plan on
never having a ramp on my trailer. The horses can step up and down easily, and IMO is much safer.