I was wanting to find out what others use to keep the ground in good shape near the barn where the horses come in and out of the stalls. Our barn when we built it was not sloped properly and in the doorways to the stalls (where the horses have constant access) eroded away and left a big hole. The horses seemed to navigate it without problem until about 2 weeks ago when my 35 year old Percheron/ TB mare slipped going in and fell down into the hole. It took us almost 3 hours and heavy equipment to get her out of the hole. Tragically she was never able to stand back up and passed away after trying her heart out to stand up. I am completely heartbroken as she was my first horse and we did everything together. If you could do it with a horse, we did it. As a result I have closed up that side of the barn completely until I can get the holes filled and the land properly graded. I NEVER want to deal with this again and as such want to know what the best thing to do to make sure it doesn't erode away again. Concrete, gravel, sand, clay? I am at a loss. Any ideas?