Social skills for autonomous people: stimming around horses



infiniteandsmall askedrealsocialskills:
Hi! I love your blog, and I had a question. I work as a groom at a barn with a thearaputic riding program, and when the people who sidewalk don’t show up I have to step in.

Several of the riders have stim by moving their hands…

Can they just let go of the reins when they need to hand-stim?  I don’t know much about theraputic riding but I was under the impression that the horses used are pretty bombproof or happy to ignore most aids, so they might not be really reactive to some random squeezing or legs swinging around. 

Ok this was probably not very helpful but I am an autistic person and I work with horses.