Okay, the things that cross your mind when you're on a road trip. Please don't laugh at me, but here goes. Can a cow roll? I've seen horses roll quite often, and they seem to really enjoy doing this. But I've NEVER seen a cow do it. Are they physically unable to? Thank you, and please, no laughing. Let me clarify a bit here on what I mean. You know how horses roll on their backs to get an itch, or whatever? That is what I have never witnessed a cow do. thanks!