We use Bears up here. Sometimes I gotta smack'em around and make them mind, But most of the time they're well behaved. We don't work'em too hard in the fall, I like to let'em fatten up for the winter.
I saw this a few months ago, made the rounds on a horse site my wife frequents. Worse part is, even though this is photoshopped, they did a search on snopes.com and found some real pictures of this from the turn of the century!