Ok so today I worked with my horse on loping which is something that she hasn't done in a while, but at the beginning after warming up I loped her and surprisingly her lope was really good. Normally she has a reallyfas lope and is all over te place kinda hard to control. But then when my sister came in the arena to work with her horse, my horse started to not listen and would back up when I wanted her to go forward and had a really fast trot and was just all over the place again. So Whenever her horse isnt in the arena my horse does fine with loping but when she is my horse always starts to not listen and just go all over the place.
Do you guys have any sollutions?