I think he's trying to talk. That is so funny! He's gonna be a howler when he figures it out. I wish I had a video of my friend's dog singing along with Shania Twain. It was "pee your pants funny" as my daughter would say.
LOL That's hilarious. What was even funnier was Xerxes going over to the speaker and cocking his head listening to it! LOL Now he's convinced theres a dog hiding behind the console and he keeps sticking his nose back there LOL