The horse I'm riding hates riding in circles. She'll lunge, quite well and in different size circles up to the trot, but it's a bit of work to get her into the lope. When there's someone on her, though, she absolutely refuses.
I was 'lunging' her with my cousin on her and she absolutely refused to trot--she came after me like she was going to bite. Finally, she started trotting. Later, I jumped on her and she would trot in circles for me but she wouldn't lope--bucked every time I asked. I thought maybe she was in pain, but she lopes without complaint as long as we're not circling, even if we're turning. (checked right away.) Finally, I just kept on asking no matter what she did and she started loping for a couple strides. There was nothing off with her gait or anything like that, but are there signs I should look for? Also, any advice?