Of wooden horse droppings:
Many years ago, I was in the habit of using a gun shop [1] in "New Row" (behind St Martin in the Fields", London). Just along the street was a shop (it may still be there) which had a beautiful wooden rocking horse outside as an advertisement. One day, while walking past, I noticed that someone had glued a number of conkers (Horse Chestnuts) to a board and had left said board behind the horse. I just wish I'd had a camera.
Walrus
[1] "Thos. Bland and Son" -alas now defunct- the only place I knew that could buy full size musket flints in central London