My pony is working really well at the moment in the school. However, when we are out on a hack and I ride with a longer rein, she has started snatching the reins from me, pulling me out of the saddle. This can happen at any time, and I can't always tell when she is going to do it, when I can tell, I always brace and stop her. It doesn't seem to relate to a certain pace and she doesn't do it in the school when we are working. I have been looking at bitless bridles and like the idea of the sidepull. I would only use this out on hacks, so there is a clear message that when she wears the bitless we are not working.
I don't want to ride her on hacks as if I am schooling her as I think we both need to get away from constant schooling.
Do any of you use both bitted and bitless bridles? and do you think this would work? Or are there any suggestions of how I can get her to stop snatching?