Mine howls if you start howling, and sometimes he'll moan and whine if I start doing the same- he's a good little copy cat... er dog. Also if it seems like he's going on a walk (you start getting ready and/or mention "walk") he'll start making noise and getting all excited. I'll try to get a pic sometime, but my dog, Bear, smiles too... I'm not kidding, he curls his lips up and bares his front teeth (not aggressively, although he does that too) and wags his tail very fervently.