What do you think of this article? I think that the fact that cats refuse to be tested might show that THEY are actually smarter :) Seriously though, I think it's comparing apples and oranges. Dogs tend to want to please - and therefore may be more willing to take a test. However I had a dog that always wanted to see what the 'reward' was before he did anything - and cats that are very eager to please. I guess at the end of the day, every animal is different!