If she were my horse, she'd be tied all day until she learned to accept it. Might take a super long time since she's been able to get away with it for 15 years.[/QUOTE]
I only have a few ideas, one like Beau said, I would tie her to something that will not break and I would tie it "short" and let her stand all day everyday. I had a horse someone asked me to help them with very much like your horse. I told them what I would do and that doing it this way you either break the horse and it stops pulling or you break the horse
I have tryed teaching them to move forward to release but either I have not worked on it enough or it doesn't work I haven't had much luck with this methid. But it make since to me that is should.
The only other thing I
would try is hobble breaking. It might help, if not if she is brook to hobble she can be hobble rather then tied. I would not recommend just anyone try hobble breaking, I have my way of doing it but I would say you need to talk to a trainer about hobbles and have them work with you and your horse if that is the way you go.
What kind of halters are you using?
The ones with the cheek snap are crap.
I like rope halters with no hardware. don't go cheap with a halter spend the money and get a good one.
I also sometimes run a rope through the halter and tie it around the horses neck right behind the ears (you need to know how to tie a bowline knot
) you know the more I talk about this the more I would say you really might need to talk to someone that can be there with you as you work through this.
You can really easily mess up your horse you can get hart or you horse could. Talk to a trainer. Good luck. To everyone else that read this, this is why it is SO importent to teach your horse to stand tied. Its a need for every horse.