Horse spooks at ground
I just recently bought a new horse about a month that I need some help with. She is very easily spooked by things on the ground, this includes weeds, dried clumps of grass, logs, different colored dirt, cobwebs, etc. Sometimes she just eyes them funny and sidesteps, sometimes she tries to spin, sometimes she will start to walk over the object like its nothing at all then suddenly jump straight up in the air like a bronc. If you try to correct her from just sidestepping but pulling the rein back in the direction you want, it usually excalates the situation and makes the spook worse. She also spooks when tied, like if she is tied next to another horse at the trailer and that horse starts to play with something on the fender, or if her rope moves in the wind, or for instance today I went to snap a different lead on her and also had a bottle in my hand that taped against the snap which set her back on her haunches. However things like deer jumping out of the bushes or machinery doesn't phase her much.
I have a bad back, so the leaping and jumping sideways is just not helping me one bit, and is definitely making me more tense which it turn doesn't help her settle. I am looking for some ideas on excersizes that I can do on the ground to help her get over the spooking, and then perhaps incorporate them into riding excersizes when my back is feeling better.