when you say "charged viciously" I assume you mean at you? And not just forward.
Well the first thing I'd think is to give her a tap on the shoulder with the whip if she starts coming at you, holding onto the tail of the whip so that you don't wind up actually whipping her with it and causing damage..but just a hard enough "bite" for her to notice and think about respecting your space.
If you haven't, you could also try doing some groundwork. I don't do much of that with my horses, but I do make sure I have the basics in place so that they can be utilized if they are being dangerous or disrespectful..and it does sound like that's what she's doing here. It also might help lay down a bit of a foundation for lunging.
I just make sure I can get them to back out of my space (by wiggling the leadrope/making a waving or shooing gesture towards their chest/etc) and move their front and hind ends seperately away from pressure. For the front end, I put pressure on the centre area of the shoulder (patting or poking it with my hand) until the horse moves away correctly, usually stepping across with the nearest leg. For the hind end, I step to the side I want the horse to move away from, stare intently (in a "I want you to move" sort of way) at the horse's hind end, and make a shooing motion with my hand, aiming towards the rear. Usually when teaching this, I start with that motion, then start tapping on the horse's side with my hand, then use more of a poking or patting motion, all increasing slowly until the horse steps over in the correct way (usually with the near hind leg crossing over the far hind leg)
Those are pretty much the only things I do. It seems to work pretty well for me and my boys. Some will say that you have to do groundwork in a specifically designed (overpriced) rope halter with a long lead. I say not. It is a little bit harder to get the horse to learn the jiggling-the-rope backing method in a normal halter, but very much doable. Other than that, I have no issues with it. I try to be practical about horsemanship and not do things that are, or buy equipment that is, unnecessary.
But anyway. Maybe my explaination of groundwork ideas is enough, or maybe someone else will explain better. Just thought I'd toss my thoughts out there.
Good luck with your girl. She's very pretty =)
Last edited by rocky pony; 12-09-2009 at 04:22 AM.