I use my mare as a lesson horse. Walk/trot english and some jumping. She has started to become cinchy when I saddle her. I have ruled out the possibility that the saddle doesnt fit her. It fits well. I am not making the cinch too tight. When I do this, I don't even have to be tightening it. Just touching her girth area will sometimes cause her to bite, swish her tail, or even kick. It worsens when I actually move to tighten it. Any ideas why she does this (only started a few months ago and is getting worse and I've had her for 7 years.) Any ideas on how to fix it?