I got a 4yo TB mare a month ago, but she has been off the track for a year. She behaves great in the indoor (attached to the barn) and the small outdoor (right outside of the barn), but when I try to take her on trails or in the large outdoor arena where you can't see the barn, she gets tense and really scared. In the large outdoor, she is usually really tense in her back and might try to gallop a bit. After an hour I can get her to calm down and go nicely though.
When I take her on a "trail ride" (we just hack around a hilly hay field), she gets scared when she can't see the barn or other horses. She freezes and her heart starts to beat SO fast- I can feel it moving my legs. Then she starts trying to run back to the barn. I try to stop her and make her go forwards, but then she rears and spins at the same time. Last time she did this was a week ago and I just got off and walked her on the path back to the barn.
I have tried taking her out with 3 other horses but she threw a fit about being in back- she wanted to be in front the whole time. I took her out with just one other horse, but she still got so scared and had to go back.
What should I do? I really want to do eventing with her, so she is going to have to be away from the barn and by herself. I have thought about just taking her for a walk on a lead rope around the field, but I'm afraid she will pull the rope out of my hands and run back to the barn. I have asked my trainer about lunging her out there, but she doesn't want the ground to get messed up as we only haclk around the outer edge of the field.