It's small enough to be a foal, but the nasal sinus seem to thin in the front to support front teeth, so maybe cow? But it still doesn't seem right, I found it in a creek behind a nice neighborhood, maybe someone went hunting out of country? It would really be cool if it was a gazelle or something. Is that even legal? I don't know anything about hunting abroad, I do know some neighbors did it though.
Or maybe it's an alien? Or an extraterrestrial's dinner? Lol