The very first thing I noticed is that you need to work on your hands. You definitely need to widen them. It appears as though you're riding in a large roundpen (although correct me if I'm wrong), which means you are essentially riding in one large circle. Ideally, you should be looking into your turns instead of looking straight forward. Also, your outside hand should have more contact in order to support her through your circle, and your inside leg should be used to push her out into your circle. Your inside hand should only be used as a guidance reminder if she is not responding to your other aids. You should never have to have your hands become that uneven by trying to give her direction. Put a bit more bend at your elbow, and pretend they're glued to your hips - this should help to keep your hands from moving forward and becoming uneven. Also, when you do have to use your reins for an aid, a take-give motion is more effective than a constant pulling back.
As far as your position goes, you need to sink more weight into your heels. It also looks as though you may just be standing in the stirrups instead of rising naturally with your horse. It might help to drop your stirrups & try posting without the help of something under your feet. This will force you to rely on muscle strength to post up, instead of relying on your stirrups.
She looks kinda built down hill and I think you could work on her topline and develop those muscles so she won't carry her head so high when you ride her. I have no clue how you do that but I know it's a good thing to have a topline. XD When a horse has a topline you can usually see a muscle running along the top of their neck when they flex their neck.
He does look to be a little downhill and it will make getting him to stretch over his topline a little difficult. That being said, you'll never build up the proper muscles if you work him hollow like he's going in those pictures. You look to be a good rider, so I'm sure your ready to turn things up a notch. If you fix your hand position, so that you have a straight line from your elbow to bit, it will go a long way toward getting your horse to reach into the contact and become soft in the bit rather than bracing against it like he's doing now. In those pictures, your hands are too low to create that line. Lift them up, usually a pinky's length above the withers, bring your hands forward so they are in front of the pommel, take up the slack, and that should create a more accurate line to his mouth. The "contact" itself should be just enough so that you can feel his mouth without pulling on it. (if that makes sense) Ideally you want your horse to move with his head slightly in front of the vertical. He looks like he has the impulsion necessary to drive him up properly from behind into the contact, so it's just a matter of shutting the front door a bit so he isn't running through loose contact. Start at the walk and establish the sweet spot of contact. Move up to the trot. Every time he starts to brace against the bit, come back to a walk for just one or two strides and then try trotting again. Any more and you're just letting him off the hook. Most horses get in after about 7 transitions and soften to the contact. The split second he does what you ask, soften you contact and reward him, so he knows that's what you want. He'll be using an entirely new set of muscles to do this, so be patient with him and reward him everytime he makes an effort. Good luck.
Ok thanks alot guy's. It was really sad because I did have her giving to the bit really nice for 2 weeks, then all of a sudden this week she decided she'd throw her head and brace against it. Tomorrow I think I'm going to start a full week of suppling to the bit. By the time my sister took pictures I had tired arms and I usually wear gloves when I ride, so it wasn't comfortable on my hands. She's really bouncy sometimes and that screws up my position completely... I'll I can say is I'll try to fix it this week, and hopefully my bf will take pictures on thursday then we can see where I'm at! This is good I finally get pictures to be critiqued!
Oh as for the whip thing.. its actually what we use to sack out the horses, obviously she wasn't afraid of it, lol.
She was being a real brat, all the horses were watching and she'd get farther and farther from the outside. The roundpen isn't all that big actually, but yea I really need to get things together!
I do agree that she is over weight and downhill. My mare had a slight down hill build, and with a lot of work and a lot of patience you can disguse it in the way the horse moves, and with some help of saddle lifters.
I think this horse will benifit from a regular work out plan and some lounging, if you are experienced or have a trainer ask about draw reins, they may come in handy.