Marvin seems to be finding his voice and it is so funny. He will be playing or get excited for his food and let out a ferocious little bark! He looks like he has startled himself! I don't think he realizes how to control his voice yet.
Haha, yes I remember this with Willow. The look of shock is really funny! Shadow is the same when he trumps (noisily) even now. He looks towards his bum like "what was that?!??!"
Jura apparently found her voice a couple of weeks before we picked her up from her breeder - she does like to make herself heard! Something we're working on!!