The OP said the method the trainer told her to use works but she does not like it for some reason. Sounds to me like she has a problem disciplining the horse. If she is having a problem smacking it on the ass when it kicks at her I definitely would not be telling her to tie the horses leg. Honestly sounds like the horse has her number and she should just trade in in on one that is more her level instead of using extreme training methods. Even if she gets the horse trained by someone else and they do a good job chances are it's just going to take advantage of her again because she can't discipline it properly. That's just my take on the situation though.