Some discussion recently about using a mirror for a horse that is an "only". I bought a regular door mirror. Husband mounted it on plywood screwed to the perlan. When I first took Bill out to see it, he sniffed it then ran out of the lean to. This morning I saw him sleeping in the corner by it. This afternoon I peeked around and he was standing with his nose almost on it. I don't know what he thinks about it; we'll see how it works out. It is positioned horizontally so it is off the ground. The mirror is firmly screwed to the plywood so it is not flimsy.