I have to agree: Barney is a smiling dude as well. My mother has a purebred Silky Terrorist, er, terrier. He is a wonderful dog and extremely intelligent (of course, I picked him from the litter!) He smiles every time I visit my mother and insists that I cuddle with him by jumping into my lap and literally hugging me. The amazing thing about this is that he really doesn't care for people at all, at least not in a social sense.

Would you expect a dog to smile even though he or she isn't a "people dog?"