My oldest spent her formative years with Border Collies (doing agility) so she will herd on occasion. She's the mother-hen/housemother over the other two. Just a few minutes ago she thought their wrestling and play face-biting was getting out of hand, so she stood up from where she was gnawing on her elk antler, barked ONE bark, and lay back down. The other two broke it up and slunk to opposite corners of the room.
She was dis-invited from a no-cage boarding facility because she would herd the other dogs into a corner and not let them leave . . . .