Disrespectful to Mount

So my Percheron mare Delta has some mounting issues. She knows exactly what is expected of her, but she has taken to moving away from the mounting block as well as moving away when I get a leg up. She also starts walking as soon as I am on her, and WILL NOT stop when I ask her to. Today I was asking her to stop for a good couple minutes, and she was just doing circles and backing up, but wouldn't stand still.

I know she's not confused because at first she stood well, especially for leg ups, but she has started walking away. I'm not slamming her back. Today she was the worst for a leg-up that she's ever been, it took a little while just to get her to stop backing up and swinging her butt away from me. When she finally stood and I got a leg up, she started walking off when I was still getting on.

I cannot corner her because there is electric wire on 3 sides of the arena.

Any suggestions?

Actually, that electric wire would be the fastest way to teach her. Let her swing her butt into that once, and I'm pretty sure she'd never swing her butt away again.

But lately there have been a lot of threads on this and the consensus seems to be if she wants to move away, she can move away how you want her to. Get her circling you at a good lively trot. Let her do a few circles of that, and then ask her to stand still again. Repeat as neccessary.

My gelding also has the problem of not wanting to stand still after I mount. Its easy for us because the mounting block is under an awning, with a fence around it--we end up doing a dance where he takes two steps forward, I ask him to whoa, he won't so we turn into the corner of the fence and that's that. But as soon as she starts walking, back her up--I'm not sure if the backing up she does is while you're trying to mount or after, sorry--but either way, get her to back up until she wants to stop, and then back her up some more.

If the backing up is her idea (when you're on her) when she stops, make the movement your idea. My gelding used to be very gate sour, and that was the only way he would go, so that's what we did; I'd back him up for ten steps until he realized he couldn't get what he wanted, and then he'd move on.

Tell her whos boss. Lunge her. Use a crop or spurs. NOT in a mean way... of course. Have some one hold her back and maybe a have another person ride by you. A really good horse that will set a great example

Thank you for the quick reply! I have also heard other suggestions of backing her up a lot, which I'll probably end up trying.

When a horse is being bad for mounting I usually just get on & off them about 10 times. I just get on & get/keep them stopped. Stand for 3-5 seconds then walk a few steps, halt & get off.

Usually they get the idea after that =] I used to ride a horse that would literally canter off when you started to swing your leg over, not fun.

I retrain alot of x-racehorses. They walk as the rider or jockey is thrown up on them. The first thing I teach them is the word STAND. I use positive reinforcment, treats and pats. I also use this when I break babies, because I do them by myself most of the time. It really works, but you have to use the word, and mean it. All mine learn to stand untill I have my feet in the stirrups and I am set. Then I ask them to walk off. Have a friend help with holding the horse while you give the command and mount. Be patient and don't forget to reward good behavior.

I'm not saying she is not being bad, but are you sure her saddle is not hurting her?
Before you rule it out you might want to call your vet or chiro just to be sure, especially if it has just begun to happen and she won't stop when you back her...

The last thing you want to do with a horse that walks out from under you while mounting is make it go forward, especially not at a trot. Gypsygirl has the right idea repetition is the key to learning for horses. Get on and make her stop and stand, if she moves forward back her up let her stand for a few mins then start again. Also, when you do want to walk forward take a step back and go the other direction. If your horse doesnt stand still you may want to try a patience lesson, tie the horse and let it stand for a while, as long as it takes for it to stand quietly, do this for a couple days and when the horse is good with that take the idea to riding. This will require a lot of patience on your part but take time to just stop and stand a while when your riding. These things will help your horse understand that it cannot just walk off when it pleases.

LOL, Honeysuga, I don't even HAVE a saddle. I've been riding bareback since August, but my ordered saddle is coming in about a week. Which has been fitted by a saddle fitter. The seat was the wrong size for me, so I had to exchange it, but when it comes will fit my girl fine.
We had a chiropractor out just last weekend, she was tense on her right side but there's nothing wrong with her. It was massaged out, we were given some exercises, and that's that.

Thank you everybody for the suggestions so far! I am going to dedicate tomorrow to trying to sort this issue out, today was her worst day by far. I don't want it escalating any further than it has.

Oh gotcha, just making sure. :)