Protective over her field?

Since I got my horse last Monday she's been a right b**ch! The 1st few days she was so nice and caring giving cuddles and letting me pet her but now she's been turning her back on my all the time! When I go into her paddock she immediatley puts her ears back and turns her back on me. She chased me out the field yesterday and tried to kick me. The yard I brought her from had no grass in her field what so ever but now she has loads could she be protective over her field?

It sounds like she is testing you. She is exerting her dominance, but you need to tell her, no way! This is my place and I am in charge here. While she is in the paddock, take a lunge whip in with you. (The lunge whip is only for motivation, not for beating the horse.) If she turns her back on you or pins her ears, chase her. Make her move! Have her trot around the paddock until you tell her to stop. If she tries to stop before you say, wiggle the whip at her and keep her moving. When you ask her to stop, walk towards her, if she does not act more respectful, make her move again. This time longer. She made you move, so she thinks she is in charge. Once you have established that you are in charge, her behavior should improve.