I really am not sure, we live on the side of a mountain and they run up an down the hills many times a day I see them coming down so fast I think they are going to go head first and roll. So far I haven’t seen that but it sure looks like it. So I think she got a good sprain. I have the upper part of their property fenced off for winter because it’s open now with leaves off the trees and the hawks are bad. So they only get to run up an down if I am with them I think that has helped to keep anyone else from an injury. Their little legs just aren’t so sturdy as they think .And the heavier ones even worse.