Oh man, I could go on and on about dog research. If you want a good starting ground, look up work done by Adam Miklosi, Gregory Berns, Marc Bekoff, Brain Hare, C. Passalacqua, A. Quaranta, M. Siniscalchi, G. Vallortigara, M. Udell, and J. Topal. Those are the big names that come to mind for me (I read a number of their articles for my thesis and loved every moment of it). I know some of those guys are mentioned in the article already, but I'm brain-dumping so bear with me.

Topal specifically is very interesting. He's the one who performed the first Strange Situation Test with dogs. And Miklosi, oh man, him and his group have conducted so many studies the past two decades. The work they've completed is amazing. Just look up his center of research in Budapest. Oh, the Duke Canine Cognition is also spectacular.

Also, if haven't read Gregory Berns' book yet (mentioned in the article), that is an absolute must for dog lovers anywhere. National Geographic's Science of Dogs is also fantastic (covers a lot of Miklosi's work).

And if you really want to start delving into animal intelligence, take a look at the books written by Konrad Lorenz, Marc Bekoff, Frans de Waal, or Temple Grandin. All are great starting points for introduction in the field of ethology (study of animal behavior).

I probably have way more I could write here, but I'll hold myself back for now. On a final note Dognition is a really neat site that covers the basics, and you can do cool tests with your dog!

I have no doubt. At the same time, I'll have you know that there isn't a bad bone in Scout's body and that he's a very good boy.