Mine is at least really good at picking up my tone. My roommate has a dog who is the most insane, hyper dog I've ever met. He constantly obsesses over things that only he sees, runs laps around the apartment barking, etc. He's also deaf. One day he was sitting in the kitchen barking at the top of the refrigerator because I'd put things up there that he didn't like. I kept getting up to stop him, only to sit back down and have him start again. Frustrated, I looked at my dog Dax and said "will you please make him stop?" (obviously I didn't expect her to do anything, I was venting). She gets up, goes into the kitchen next to him, and barks at him. When he doesn't respond (because he can't hear her), she paws at his shoulder to get him to look at her, then barks. Any time his focus went to the top of the fridge again, she'd repeat the process. Eventually she herded him out of the kitchen. I love my dog. I'm sure she recognized the fact that I was frustrated, and knew that when I'm frustrated like that it's usually over something the other dog was doing... therefore when I asked her "to do something" she guessed right. Or else she was just sick of listening to it too!