Tip does have different barks as well. He has a higher pitched bark when he's inside and one of his toys has rolled under the couch and he can't get it. He has a constant serious bark when someone is at the door and he doesn't know them. He fusses and barks at me in the mornings when he wants to go for his walk and I'm taking to long to get it together (I'm not a morning person). He mostly talks to me though and then he'll throw a random bark in there for good measure.