What she said.
To make sure, you could check against width of piece under hay loft. Lots of ways to go with the horse, applique over a plain square to overlap head facing sideways. Straight forward, etc.
Myself, I am partial to a nice lightning rod on a barn. Weathervanes work too. My own barns have been decorated with horseshoe clovers (so the luck cannot run out), an old Hudson Valley theme. I love the quilt barns too.... or Mail pouch
Now you have me thinking of barn quilts. Do I really need a longer list?