If when you enter her stall and she pins her ears, walk out and take the feed with you. Walk farther away and wait a minute with your back to her. Then approach again, repeating the exercise if you have to. She should make the connection after the third time. When she's enjoying her hay out in pasture, take your dressage whip which is "in case", and keep it pointed downward and behind. Circle way around her and don't look at her until you are directly behind her. The approach at the run, arms waving to make her move. Stay well back in case she kicks. When she runs, stand beside the hay. You have now claimed it for a minute. Turn your back on her and walk away so she may resume eating, then circle way around again and move her off again. By doing this she will start keeping an eye on you and will start making it harder for you to get around behind her. When she's watching you with both eyes she's acknowledging you as being of superior rank. You've just won a whole pile of respect. Horses do this in a herd so she knows how it works. It seems contradictory, but the more you move a horse away, the more it will want to be with you and respect your.