I have herding dogs. One of them is a really determined little SOB. He has successfully managed to herd sheep, geese, children, other dogs, many wolf spiders, and two actual freaking tarantulas.
He once attempted to herd a rattlesnake and was very put out when I called him off.
If I have both hands full carrying something, he will pace me and bark at anything that might cross my path. I think he's figured out I'm a hideous klutz.
The same dog is the guardian of bedtime. If we are watching a movie that runs so much as a minute past his bedtime he will climb up on the back of the couch and put his head right in my ear and sigh disconsolately over and over again, just to make sure I know he does not approve of this tomfoolery.
My other dog makes sure no crumb ever touches the ground. Drop an ice cube? He is on it! His mortal enemy is the vacuum cleaner, because it tries to do his job.