Stall height potential issue?
Due to drainage issues with our barn, we raised my mare's stall this weekend and created a gentle slope outside away from the barn. The entrance to the stall inside the barn is now 8" tall. Absolutely no issues with her going in and stepping up, but she is a bit hesitant to step down. She did it, but she's going to be 30 this year and I worry about the future. Does anyone have any ideas as to what kind of step we could build? I would like something I could move out of the way if need be. We don't normally drive through the barn but certainly did A LOT of that this weekend pulling the dump cart full of dirt in and out. Making a step out of something like concrete could create difficulties in the future with being able to drive things through.
I've toyed with buying a stall mat and cutting 3 sections out of it, each one a bit larger than the other. Stacking those and somehow bolting them together to make a step. The idea being that the smallest piece would be on the bottom, the next largest one on top of that, then the largest one on top to fabricate a ramp of sorts. I'd like to avoid having to cut the bottom of the sliding door off if I can. Or...should I just leave well enough alone for now and see how she does with age? If worse came to worse, there is a back door that I could take her in and out of that has a ramp of dirt and is covered with a stall mat.
Picture of the front of the stall.