It's too bad it doesnt wander around and graze if it had a fence around it, if it was on the farm, and if there was grass inside the fence. That's cute. I remember someone's request to make the horse friendable and thought that was fun too, though another animal to feed in winter might be a pain (friendable without feeding like the cat? Perfect). It does make grazing motions when parked on grass in places in stardew, so would be kinda neat if it could wander/graze in fenced farm areas that way.
Building and leading the horse into a paddock in the AM is a super cute idea. I get the sense that its building is supposed to resemble a lean-to shelter, with two closed in walls, but it always gave me a "stall-sliver" vibe instead for some reason lol.
I think I'm gonna build that paddock for the sake of aesthetics too, why not? It is a cute idea.