If you push her does she give to the pressure or push against you? You want the horse to give to pressure, ideally you want to be able to just push your fingertips against their neck and have them move away from the pressure. I would suggest looking into some natural horsemanship for ground work, now I am not at all one of those Parelli worshippers or anything like that, but I definately like the whole natural horsemanship idea of giving to pressure. It is a good concept with ground work, even though it can get a little ridiculous once you get to under saddle stuff. I would look into the parelli 7 games, as those are good basic ground work exercises. Even if you dont want to get fully immersed in them, game 2, the "porcupine game" at least gets them respecting your touch and moving away from pressure. hope this helps some.