Horse afraid of being ridden
I'm working on training a horse who has a fear of being ridden. She's pretty much bombproof except when you swing that second leg over she becomes a bucking bronco. I did try to ride her a little soon before receiving more information from the previous owner/trainer which had withheld from us. The horse threw me after flailing around for a while which I'm sure did add to her baggage.
Basically what I've been able to piece together is she was first trained by a traditional western horse breaker. He spent a lot of time jumping next to her making noises, etc. Apparently there was some sort of incident with the saddle slipping and tangling around her which her pervious owner neglected to tell me but I found from her second trainer who worked with her more recently. That trainer apparently was able to ride her walk, trot, canter.
Since my first unsuccessful attempts I've been working with her on the ground for about 3 months. I've desensitized her to my jumping next to her and gotten her comfortable at the mounting block. I put all of my weight in the one stirrup and leaned on her for a few weeks, she was fine with that. I then put all of my weight on her and my opposite knee half over her on her rump for a few days to a week, still completely calm. Today I put my leg over with the hope of not even riding, just getting on and off and she went full bronco again right after I got my leg over. I'm really out of incremental steps for her and am at a loss. Any thoughts?