I have a very large German Shepherd (150llbs), Zak. Most people train their dogs to speak, but I also trained him to howl on command. He also likes to howl if hear hears sirens or whistling. One weekend we were camping with a bunch of friends and 2 of them are in a band and brought a keyboard and guitar to entertain us around the campfire. Well, when the music started he was sound asleep behind the camper. About the third song in the set was "Warewolves of London". At the beginning of the song he wanders over and sits next to the keyboard. Just sitting there like he was part of the band and looking at us sitting around the campfire. When the guys reaches the chorus, which has a howl in it, he throws his head up right on cue, and howls at just the right time. The guys crack up and have to stop the song because they are laughing so much. Zak never moves and just looks at them. After gaining their composer(sp), they start the song again. This time the play the song the whole way through and Zak howls right on cue at every chorus. The song ends and he gets up and goes back behind the camper and goes to sleep. It was unbelievably funny! I wish I had a cam corder.